[regecks]

>Plus, that doesn't fix the problem of other certificates expiring, only extends it.

Although I agree fully on the sketchiness part, installing the root is a fix.

ISRG Root X1 expires in 2035. Not one of these problematic Android devices will be online anymore.

[iudqnolq]

But to have the whole modern web work you'll need to install more than one root.