You couldn’t have said it better. If money and revenue is an issue, then why keep chasing the next shiny thing.
Just last month, they had a press release announcing they’ll incorporate AI into their product suite. In my opinion, the release was just a buzzword laden nonsense. I just don’t see the why other than to keep themselves relevant.
I am pretty sure 2.5GBe will work over normal/standard CAT5 and Cat5e cable. It’s the upstream switch that you’ll need to replace.