My main systems I rarely change, but I recently did as I moved to Solus. On the desktop, I have run systems for 4+ years without reinstalling both with Fedora/Ultramarine and EndeavourOS.
I have several old laptops, from 7th gen intel to more recent ones. Those are where I will test out things and play with other distros. Currently I have one XPS 13 (2017) running the new KDE Linux. Another XPS 13 (2018) running AerynOS. My main desktops and laptops will remain on Solus, with 1 of each being on the Unstable repo. I have a mini lab and VM lab for other testing and compiling.
So I still feed my need to explore, but have my main systems all on Solus, for which they will stay until something happens that causes me to move. Hoping that will not happen.
On a side note about distro-hopping, I found one of my old journals from the 90s and early 2000s where I logged my testing back then. Going through that along with my memory of others I have tested, I am around 135 distinct ditstros I have tested. Not 100% accurate on the count as I tried some truly small distros.