I see you tell jokes, huh. 10w30 isn’t a “dated” design just because todays US engines don’t call for it due to fuel economy pursuits. On the contrary, @High Performance Lubricants No VII 10w30 is among today’s most advanced oils you could possibly put into your sump.Also 10W-30 is a dated design that serves little purpose anymore, just like 10W-40 that some old timers just can't let go of. There are much more modern designed oils that will protect better in a wider range.
In about 95% of all engines in about 95% of the US, you could easily run 10w30 year round with no detriment. Mobil 1 just reformulated their EP 10w30 to API SP, and HPL released both a 10w20 and 10w30 within the past year.
If choosing a good brand, a 10wXX oil is likely to be formulated with very little to zero VIIs, meaning viscosity loss due to mechanical shearing is not as likely, and these oils generally possess extremely low Noack evaporation as well. Considering 10wXX oils are good to -25C at a bare minimum, exactly what do you mean that a 0wXX or 5wXX oil will “protect better over a wider range”?
Just because you’ve drank the CAFE Kool-Aid doesn’t mean engines in the real world agree.