Not necessarily, we have wireless technologies. Stringing cables along poles could well be cheaper, though.

I’m thinking with 4G, 5g, one day 6g and one day 7g, physical data infra’s days are numbered or will become a premium product at the residential level.

Except in Canada and elsewhere where the mobile and wireline providers are the same and deliberately keep mobile pricing high enough to disincentivize cord cutting.

None of those create more radio spectrum. I don't see a real replacement for wireline fiber and ethernet ever.

Each "g" let us modulate more data in the same channel size. Spectrum re-use via smaller cells is virtually limitless.

And we're re-allocating more spectrum for 2-way data regularly.

But if the cells keep getting smaller, at some point it will be cheaper to just bury that one fiber to beat out 12G plus the next 5 generations, rather than buy another cell to cover that one household.