We are already looking at the loss of 7.7 on a platform in the somewhat near term. It will not run on Apple M1 hardware without emulation, it will not be recompiled for that architecture. So in maybe 4 or 5 years, there will be a very small and shrinking number of Mac users able to run native Eagle 7.
I still have old running Macs, plus Windows and Linux options for continuing to run Eagle. But all my new personal designs have been in KiCad. Industry is settling into Altium pretty much everywhere else I've seen.