[Development] Deprecation/removal model going into Qt 6

[Kevin Kofler]

Manuel Bergler wrote:
> And this is where we come full circle :) Yes, FOSS needs to port, so
> we should make porting as easy as possible. In particular, there
> shouldn't be too many breaking changes all at once as that would make
> porting a multi-month project. Instead, spread out the breaking
> changes by also allowing them in minor releases.

And it has already been pointed out elsewhere in this thread that this would 
be an absolute nightmare for distributions! The major releases are enough of 
a pain as it stands now, having to keep old minor releases around too 
(because some software will just never get ported, no matter how small the 
required changes are) is just not workable.

        Kevin Kofler