the thread you linked had the same wish in its core, but in order to make it simpler that wish was edited according to one specific use case: not only chaining, but the ability to record long sequences using rec feature. it’s up to the team whether it’s a duplicate or not.
I can only add that it would be great not only to chain them in a simple manner, but to create sophisticated sequences out of them, like described in this patterns related wish:
something like: you press the first variation three times, then the second one. that would mean 3x the first one, 1x the second one always in this order. if user manually activates the second already chained variation with no hotkeys, Play could continue to play that chain when that variation’s sequence ends.
user could have many variations: some of them chained, some not. there could be many chains.