The last version to support Classic will be 2025.2 you then have anywhere from 2 to 4 years of support / sustaining support etc. before you lose support completely.
I am sorry I love my classic Epicor screens, but they have been clear that this is coming. If you get yourself to 2025.2 you have at least 4 more years of quasy support, and frankly if you are in any version before 202X you are already out of support anyway so why does it matter?
If you are on SaaS and you haven’t been working to get here I feel like you’ve been asleep at the wheel, I agree it needs work don’t get me wrong (that’s why I’m not SaaS ) but yeah if you are SaaS and you are so far away from this that you can’t get there in another year I feel like you need to start making other plans oy!