they will turn off by themself.
some things in SU are actually webpages run on chromium. both warehouses for example. the websites, just like any websites, are maintained on techs that rely on the user having up to date browsers.
and a 3-4y old browser is not considered up to date.
so in a couple of month, you will have to access the warehouses directly in your browser, not in SU anymore.
edit :
as I explain here, it’s a pretty standard situation online. Major websites will only support technologies from the last 2-3 years, see my Netflix example.
The only way to update the chromium version in sketchup is to upgrade sketchup.
If you don’t , you keep all the tools and stuff, but you’ll need to access the warehouses from your own browser.