There’s not a great alternative in the next few months, perhaps not in the next few years, but in the longer term European countries should take this as a critical warning. Failing to cultivate a domestic software industry in 2025 is like failing to cultivate a domestic manufacturing industry in 1825.

Russia can do that, so can Europe.

Russia struggles as well. habr.ru is full of stories about rebranded western software and hardware sold at exorbitant prices with fake certificate of local produce )

Rebranded western software?

Some open source projects are rebranded as Russian with minimal changes, that happens, yes, but that's the result of gaming the system that incentivizes development of Russian software, not the result of sanctions.

Russian replacements of Office 365 and Google Docs seem to be doing well.

As for hardware, the EU is not yet under American sanctions.