NMS 300 is marked EOL - what now?

Difficult for answering.

On one hand, Netgear is offering the https://www.netgear.com/business/solutions/engage-controller/ 

On the other hand, this supports just the latest and greatest Netgear AV switch models.

The effective problem goes much deeper: Let's rip into Netgear for their lack of transparency on product lifecycles, shall we? Here's a few ways to see it:

• Planned Obsolescence: Netgear might be deliberately keeping you in the dark so you'll buy new products more often. They're hoping you won't know how long their stuff actually lasts, so you'll play it safe and buy a new router/switch/whatever every few years, even if the old one is still kicking.
• They Don't Care Enough About Businesses: Businesses rely on stability and predictability. With no lifecycle plan, Netgear is basically saying "hey businesses, screw your long-term planning, buy our stuff and hope it lasts!" Not exactly confidence inspiring, is it?
• Incompetent or Clueless? Maybe Netgear just doesn't have a clue about how long their products should last. That's not much better! If they can't figure out how long their own products will work, how can you trust them to deliver reliable business solutions?

Netgear's lack of product lifecycle plan is a slap in the face to businesses who need stability and predictability. It's either a cynical ploy to make more money or a sign of ineptitude. Neither reflects well on Netgear Business.

We can dispute why Netgear goes cluttering their path with far to many niche solutions instead of offering something more complete and sophisticated?

Good morning Netgear, here is the business reality for you. It will be a long way. Eat or die.

When will we see a comprehensive life cycle information for all your business products please? Your competition is offering this for many years:

eg. HPE

eg. Cisco:

Please LaurentMa make this Netgear Business priority number one! As of today, Netgear is not competitive, and does bring all your partners into major risks.

As a reseller, as a system integrator, as an active member of the community: We're no longer able to continue any business with Netgear under these conditions. We simply don't know if the "new" products we ordering today are rendered useless because of some manages have to idea to declare a product EOL from one day to another. Without any warning. A complete unpredictable partnership. Act now!