What would the years be based on? When the vehicle first entered service? Or when it left service? Because there is a big gap there. Or perhaps median service life? Also what about vehicles that saw service in different nations? Say Pz IVs that were sent to the middle east in the '60s? Regarding service life, what about vehicles that were in service for so long that this system wouldn’t result in them seeing all their true years if it was just one battle rating? Like soviet tanks from the mid-cold war in service so long that they’re being used today in 2026?
Also this isn’t getting into ammunition and missiles as well. What about tanks introduced in the '50s in game but are given '70s ammo? Or jets with later missiles as an option than they entered service with? Or perhaps jets that have missiles that are obsolete to what they entered service with, with a-historically weak armaments as the proper ones are omitted? Same with equipment, like jets that didn’t have RWR when they entered service having RWR and stuff in game, because they’re later modifications? Or model of vehicles that are not accurate to their earlier models, ex. the IS-3 being a later-style model than the original '45 version?
I am not against historical matchmaking as an optional thing, but I think just adapting the current BR system for it isn’t detailed enough to make a proper historical matchup, (much less one even semi-balanced), so I just wanted to bring up these potential flaws and questions regarding it.

