there are other sites that tend to be a little too "ProOS4" either. F.e. Amigaworld is crowded with OS4 fans (I think the majority that is there, at least the visible majority). There are other sites that are more 68k orientated. And whomever you ask has a good advice that you should use his preferred OS/choice and knows exactly why the other choices are wrong even though he obviously has (or never) used the other choices. And the less experiences persons have the stronger are the opinions :-). So do not expect neutral advices (with some exceptions that use several systems).
There are different choices:
68k with old used classic computers and the FPGA Arcade as a new option
PPC based machines with either MorphOS (running on used Macs) or AOS running on new systems (but of course more costly)
Aros being opensource and running on different hardware including X86, ARM, 68k and PPC
Inform yourself on different sites, look in Youtube and then ask questions. And if someone tells you you should use "XYZ" then ask him if he knows the other OSs and when he last used them.