I have the feeling we jump from ban to ban because of the problem that is Tera. Arch was a huge problem because even revenge kill it was difficult because it could tera fairy; Raging bolt is difficult to deal because it can tera fairy/flying to avoid being revenge by tusk or lando and then fire back with draco; kingambit is a pain because it can tera whatever and hit back counters, or go tera dark for insane damage. Dont make me start with tera blast giving coverage to mons that were designed to not have those moves.
We are still looking at the symptoms instead of the main problem.
Sadly, i think with how close was kyurem suspect, which should be an obvious ban because only glowking checks the specs set, its clear that tera suspect wont end in a ban because there is more "deal with it" mentality than people looking for an actually healthy meta without a lot of 50/50 situations or ban upon ban.
Most of these bans aren't even due to tera. Tera, while being a "rich get richer" type of mechanic, does not break the vast majority of mons that got banned this generation. Tera was not responsible for the ban of Annihilape, Archaludon, Chien-Pao, Chi-Yu, Flutter Mane, Iron Bundle, Magearna, Palafin, Sneasler, Bloodmoon, Urshifu, Zamazenta-C, shed tail, or last respects. This leaves us with Espathra, Regieleki, Ogerpon-Hearthflame (which is debatably still broken in a teraless metagame because you can't tera dragon to beat it and it has mold breaker to cheese unawares and flash fire Heatran), and Terapagos.
I'm not sure you would want Espathra in the metagame regardless, yes it's not broken in a tera metagame, but it's also just annoying cheese, the same way that psyspam can be frustrating to play against but isn't necessarily good. Regieleki is for sure not broken without tera and could be nice against booster mons, so I'll give that one a pass. Terapagos is the one I'd most like back if tera gets banned because it's a decent rapid spinner and has great utility, but that's really the only mon. Volcarona did get previously banned due to tera, so there is that too, but it doesn't feel overwhelming to me in my opinion.
All those mons I mentioned earlier would still probably be broken in a teraless metagame anyways. Annihilape would obliterate defensive teams, Archaludon doesn't even need tera, yes you can switch it in and tera to avoid damage, but even without tera you aren't killing it; it's getting its 2 kills as is. Chien-Pao would probably force Dondozo on most balance teams, Chi-Yu (lol), Flutter Mane (lol), Iron Bundle is hard to switch into for how fast it is, Magearna already has a phenomenal typing and can stored power cheese a lot of mons, Palafin would probably be too strong, Sneasler would still cheese regardless of tera to be honest (and to be fair, grass spam structures are very strong right now, they don't need more buffs), Bloodmoon is still going to be hard to kill while dealing copious amounts of damage, and Urshifu, maybe it isn't that broken, but tera isn't what pushes it over the edge, swords dance does.
Overall, "how many more mons need to be banned before people find out tera is the issue" is not a valid argument to me because only a couple of mons actually got banned due to tera, the tier would still need bans without tera, and some mons become even stronger
without tera, probably to the point of overpowered. If a tera ban wants to be considered, it should be in my opinion only because of the variance and prediction factor, which I personally find manageable, at least right now.
