ZDoom

Why should anyone object?

I have no objections - I think it's much needed - and making it user-accessible is even better (although that will ultimately decrease the number of bug reports we get for affected maps since the user will now be able to fix them on their own).

I would like to add a compatibility option for this. Here is the PR. If there will be no objection, I'll add compatibility entries for affected maps.

Not mostly, but totally the same thing. To make it short - the option was broken in those older versions, but as a workaround, just disabling the option in those affected maps looks like the best option.

Well, all maps have explicit CheckSwitchRange property set in MAPINFO

Also, it's mostly a duplicate of this report because a line stopped triggering for the same reason.

This has always been a "won't fix", if I recall correctly. But the last time this was reported the compatibility system was nowhere near as extensive as it is now - maybe it might be time to revisit this.

The issue here is that the author ignorantly enforced check switch height when, with the mirror, the switch is completely out of view. In fact, it's inside the floor/ceiling, it's strictly a +use linedef with no switch whatsoever. The trick worked in older GZDoom's due to a bug that was since fixed.

The way to fix this is to simply disable the switch height checks for those maps.

According to leodoom85 via Discord, this has possibly been broken since GZDoom 2.2.0, if I understand correctly.

Trigger line, which must transport player to the next map wont work in recent gzdoom version.
Link to unloved 2
https://www.doomworld.com/forum/topic/5 ... -released/
Position of a line -2088 809 400, you must press use to trigger it.
Also there are dont work trigger line with letter, position -2394 1265 416.
Both line works in zandronum.