Going forward how bad of a move this is for one of Europe's leading tech companies will be apparent IMO. It's all about the moat. The sanctions started to fill in the moat when they catalysed a massive investment on lithography in China, but did wonders to preserve the moat of Nvidia, Intel, ARM, etc by setting their Chinese counterparts back a decade.
Were talking a small market of countries or super massive corporations that could possibly afford to build a fab.
The revenue is that eventually hardware needs to be replaced, and existing fans have to either upgrade or scale horizontally if they want to keep up with market and demands.