Is it possible to change the DE without formatting?

I am tired of GNOME breaking all extension dependencies on each update, and I wanted to migrate to KDE plasma. Is there any guide out there explaining how to install one DE and remove the other?

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For example, have a look at this discussion:

There is a wiki article on how to install each desktop:


The most complicated/faffy part of the procedure was tidying up my ~/.{cache,config} directories after the transition, but that’s optional.