[A basket of plugins I use] Legacy plugins

Seems I have some difficult choices to make. Under Legacy Plugins being unsupported I have, across a number of websites (not just the one indicated), the following:

Appointments+

CoursePress Pro

Events+

MembershipPro

(and some others)

Do I understand correctly that these are now no further supported.

AND where can I find a 'list' of premium plugins that are being supported.