I switch between IntelliJ and Eclipse during my daily workflow and IntelliJ always feels like an absolute hog. And I do feel like it's been getting worse with the later releases.
Only started using IntelliJ about 3-4 years back (due to Android development) so I don't have any comparison from older days there.
No change / add in plugin's everything same.
Switched to using '17.0.8 Eclipse Temurin Java Runtime' and it's fast as before this release.
Hope this helps someone.