If you only play 1 tree, level 57 can reach end-of-the-line easily (especially in smaller tech trees).
Using a very rough estimation, getting a 13.7 aircraft should come out at around 3169700 RP
Estimation: I ignore dependencies, folders. I take lowest BR aircraft and multiply its BR requirements by five. This estimation underestimates in case of USA, but likely correct for likes of japan or sweden.
According to old wiki, Ranks - War Thunder Wiki, level 40 corresponds to 3.3 million RP.
Even with a 50% error to my estimation, a level 57 has long-since acquired multiple rank 8 vehicles assuming they stick to a single game mode and tech tree (level 57 corresponds to 5.7 mil RP).
A cursory google search gives me the following for total RP needed for completely unlocking (not spading) tech trees in 2022 august 6:
● USA - 9,118,500
● Germany - 6,922,300
● Russia - 8,313,700
● Britain - 6,380,900
● Japan - 3,991,900
● China - 5,178,700
● Italy - 3,062,200
● France - 5,386,600
● Sweden - 3,035,600
● Israel - 3,582,000
Now, this is 2 years old and more vehicles have been added since. However, it also counts foldered vehicles and total tree, not “RP to reach and unlock a single rank 8 aircraft.” Given this, I do believe it to be within reasonable estimation to safely conclude that someone with a level 57 account may have reached top tier, especially if they pick a smaller tree and play it smart (use foldered vehicles to speed up unlocking next rank for less RP).
Israel is not exactly representative given it starts at rank 4.
All this is of course irrelevant given the person being commented upon is level 100 and statshark says they’ve played hundreds of games at rank 8 in arcade.
Still, I feel my post has merit because I feel people seriously over-estimate the RP needed to reach a single top tier vehicle or under-estimate the RP needed to reach level 100 account. A level 100 account corresponds to 14,482,500 RP. Total unlock of the USA air tree (all foldered vehicles) 2 years ago (2022, aug 6) corresponds to level 76.