I’m also still running 2.4.2, but I’m doing so out of choice having tried every released version up to the current 3.7.1. Be aware that versions later than 2.4.2 are not backwardly compatible, meaning that any project made with Audacity 3.x cannot be opened in Audacity 2.x. For the last few releases, projects are not backwardly compatible at all, meaning that a project created or edited or even just opened in Audacity 3.7.1 can not be opened in Audacity 3.7.0 or any earlier version.
If you want to try out more recent versions, put it into a different directory to your old version so that your old version is not overwritten, and use “Portable Settings” (see: Preferences - Audacity Manual) so that the new version does not mess up your current 2.4.2 version. Test thoroughly with unimportant projects before using it for anything important.