What are the main functions that the PMM interfaces with and how do you see this changing over the next 2-5 years?

It's really the following three functions: product, sales and the greater marketing team. You will regularly interface with these three, and depending on the company will be deeply embedded with product and sales. 

The one way I see this changing is that businesses increasingly need to bring B2D aka Business to Developer sensibilities to the fore. Think about how so many companies are becoming "platform companies" and that means that product marketing will also need to supporters stakeholders such as Dev Rel and/or BD who interface with developers and partners respectively. 

I heard the other day APIs being described as self-service BD for companies, and that really rings true in this day and age. Every company is either sitting on a data asset or has a customer base that others want to plug into. As a PMM, your ability to market your wares and interop frameworks and making internal stakeholders on that side of the house equally as successful as sales and product will be increasingly important. 

I'd expect PMMs to interface heavily with Product, Enablement, and Go-to-Market teams, this is almost a daisy chain where PMM is partnering with Product to usher the company's offerings to the customer. Bringing value to the market and driving revenue for the company. Of course, Product Marketing should always be interfacing (and partnering!) with the core marketing team as well.

Depending on the go-to-market model, where PMMs spend time will differ. And over the next few years, I don't expect major changes, but if it's not already happening I'd encourage and expect increased collaboration with finance and operations teams. PMMs need to work closely with finance and ops on TAM analysis, forecasting, and identifying future opportunities, and locating gaps in the revenue model. This continued, and potentially greater, collaboration with finance and ops will give PMMs a more holistic view of the business and greater impact on company strategy and success.

Some of my favorite initiatives are ones in which I've been able to lock arms with finance and create significant change in an organization.

Although it varies across different organizations, Product Marketing primarily interfaces with:

• Product Management -- Core collaboration around defining the product roadmap, value proposition, pricing, and feature launches. Also to close the feedback loop from the customers

• Sales - Aligning with them on the core marketing narratives and enabling the teams with relevant product information

• Marketing - Improve brand perception, generate demand, and drive leads with compelling campaigns

• Growth - Drive free trials and adoption of the product. Partner on increasing usage and retention.

• Customer success - Understanding usage patterns, pain points, feedback loops, and upsell opportunities

Over time, we are starting to notice that the time between any two release cycles is starting to reduce in every organizations. This is primarily driven by increasing customer demands, improving delivery times with AI, and continuous disruption from niche players. Primarily due to this reason, we are starting to notice a tighter integration from product development to distribution. Recent shifts from organizations like AirBnB (reframing product management function to product marketing) signals the same. Primarily driven by this change, we might start to see Product Marketing as a function spill over a lot more into targeted specializations like growth, content creation, and product management

Great point on Developers. very true. But only "few companies" can claim to be true platform companies. Everyone tries to say they have a platform, but in order to build platform, you have engineer very differently. Complex discussion on data privacy, security, integration management, etc. It's good aspiration for sure. 

Meanwhile, I wrote a blog a while ago about role of PMM in changing tech landscape https://www.linkedin.com/pulse/product-marketers-role-changing-tech-landscape-savita-kini/ 

My experience is primarily B2B, particularly mid to large enterprise space. So it probably doesn't cover all scenarios.