i have some xt60, and maybe 90, dont know, too much stuff piling up^^
i assume the rating goes for 1 wire, not for both, so it would make the connector practically a 120a or 100a - i guess enough for our needs right?^^
while i sort of hate the anderson in upss because too short cables, no space to work with and the possability to DUCK up the servers behind it, i would prefer the screwed down anderson versus the loose and tiny xt60.
i use 1 pair of xt60 to power some tp4056 of a server psu and it sucks. it is solid and all but i have always worries to kill a cable and you only can solder to them, the amount of connector to grip is also tiny for the power you need to disconect them