Installing Valetudo stops any firmeware updates forever from the OEM. [1]

I wouldn't consider it a hack. It's an alternative way to run your vacuum, with yes potentially less features if the OEM makes a lot of future updates, but Valetudo also comes with their own set of updates.

[1] https://valetudo.cloud/pages/usage/firmware-updates.html

> plus it can void your warranty

Unless you happen to live in a jurisdiction that care more about users than companies, like the EU. The manufacturer would have to prove that the new custom firmware is actually the cause of the damage, otherwise they need to fulfill the warranty guarantee regardless of what firmware you run.