Are non run flat owners simply carrying foam?

as a newbie to a 222, I opted for NRF's for the quiet...
has anyone had any experiences to relate??
I was never that concerned. TPMS sensors give you a lot of warning if you have a leak -- often enough to get to a station in time. In the event of total tire failure, you have a phone. But, flat tires are pretty rare these days. To be fair, I also never wait until I hit the treadbars before I replace my tires.
I also have a repair kit.
But currently looking into Armour Seal that you add to you tyres prior to having a puncture which acts like the repair kit and seals up to 15mm apparently.
I have had cars without spares and no runflats since 2008/9 and, touch wood, have had no punctures.
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