There’s absolutely zero reason to expect Linux mass adoption as it is NOT happening anytime soon. What can happen instead is increased market share to something like 10% and even that is super optimistic from a long time user perspective.
The focus should mainly go to relatively technical users that can at least manage basic stuff and not mass market consumers. It’s good when people try Linux, yes, but it’s even better when they find it useful, it does what they need and they keep using it, not just trying and go back to a primarily supported OS that’s maybe invasive but “at least it works”.