We've created two tags to separate questions that are about installing Ubuntu and installing something in Ubuntu: system-installation and software-installation. This is with the purpose of getting rid of the install tag.
There are over 12k instances (and growing! it's the 2nd most popular tag) that need to be disambiguated manually, so I've doing this mostly organically and it takes forever. Granted, it could go quicker if we set our collective minds to it, but we don't want to fill the front page with that so we'd keep doing a handful at a time.
Unfortunately, the questions keep coming in. I try to catch them early but some always fall through the cracks.