Applications like linear and nextcloud aren't designed to be opened and closed constantly. You open them once and then work in that tab for the remainder of your session.

As others have pointed out in this thread, "feeling slow" is mostly due to the number of fetch requests and the backend serving those requests.

If you want to run something like sharepoint suite locally, this is the best option. Question is - do you want/need to run sharepoint locally?

I hate javascript and I have it off by default. With that being said, this is a huge app with tons of options. Other apps without compression are just as bad

Draw io - 25MB

Outlook - 30MB

Gmail - 30MB

The difference is, this is oss, anyone can contribute and fix it