Lets look at the bigger picture here, the guy says that 25 "has different gearing experience".
Dude, the entire bracket from 1 to 50 (at the moment) has different experiences. Everyone can gear up differently, but most just tend to follow the BEST meta. Anyone can have different kinds of gear that yeah, maybe not the BiS but still can sustain. Every bracket has many other substitutes to gear. You see everyone has the ghost dragon trink? No, bec there are other trinks that fit to other peoples needs and builds. If we followed your mentality, that means each individual level needs an entire thread of its own lmao. But its done in that way because in the end most of the close brackets are designed to be relative, due to the fact that most of them share similarities, does not mean theyre 100% same. A level 10 toon might have the same experience as a lvl 20 toon. Yet they also can have a different experience. Same with your 25 and 26-27-28-29 etc. Its not entirely rocket science that 25 can reach peak godhood or something, that same level another level one higher than it can do the exact same thing. Which is why 20-29 exists, basically those brackets can do the exact same thing, either with a different twist, or no twist at all.
(Edit: PS you just want to push your Grandfathered 25 toon to spot light being epic and all, and yeah gear look great and fine, but 1 character isnt going to change the world)