While there does not appear to be an official announcement from Motorola on their website at this point, RJL’s blog post earlier today outlines the end of sale of the AP300, the migration path, and some Q&A for existing customers that may be affected by it.
I could not find an announcement on Motorola’s website, but the AP650 is known to not work with their older WS5100 switches and WS2000 switches. If you’re in a boat where you’ll need to add more APs next year and are still running their older infrastructure, it’s likely time to do a life cycle review and start looking at your options in the market.
Read more about the replacement model AP650 on Motopedia.
Read some Q&A about the end of sale on RJL's blog.