yes ive switched back and forwards between Arc and Safari - however since Arc effectively “pushed” people to Dia, I have found I use that as my primary browser, only switching back to Safari (and sometimes firefox) when theres a functional incompatablity.
as above it’s annoying it doesn’t faciltate the extension graphically but C copies it to the clipboard ready to paste into DEVONthink - i can live with that..
all the other extensions I use work ok with Dia ( although I find myself using linkding less and DT4 more for read-it-later and just sweeping such items into a short term DT database