It’s a shame that Valve couldn’t get Steam to issue them a new AppID, so they had to delete CSGO in order to put CS2 on the store. It was the only way.
they were never going to be able to release a totally new game without a lot of backlash from the addict skin trading communities. They wouldn’t want to risk their free income from the whales by splitting the player base and eventually shunning the skin investors stuck on the old game.