The gentleman favorite is slowly switching from PS2 to SBF in my region so "no PS2" isn't as big an issue as people make it to be.
IMO the real argument for hazards on is that it is possible to make large stage list composed of unique stage layout.
For example the H+ list I recommend currently
View attachment 337434
-Battlefield is removed because while FoD and YS are pretty different from one another they are both similar to BF so keeping it legal increases the redundancy by a lot
-with this we have 7 unique layouts so we only need one ban in the counterpick phase which leads to an increased stage diversity during counterpick phase (which is IMO the biggest flaw with the current 8/9 stages 3 bans system we see in the current meta)
-a lot of stages have dynamic elements which increases the number of scenarios and give the "stage mastery" aspect of competitive smash more depth.
-it also gets rid of the "Kalos/Northern Cave" dichotomy
The main problem that comes with this list is that by raising stage diversity you add more things to learn for competitive players in a game where you already have a very diverse and potent character cast, asking even more work from them to get consistent wins. And the direct consequence of that will be that people will complain too much about the stages being "inconsistent" and will vouch for a return to the usual stage list before trying to adapt.
TL;DR I think hazards on is worth a try but it will be unpopular in the beginning and if we really want to test it we must get past this initial reaction.