Marantz was the bomb. We had speakers so large they were on wheels. I installed an 8 track in a '64 Mustang.
Music was public, and phone calls were private.
I have the free Starlink 911 service with T-Mobile. It provides texts to 911 when out of cell range. Whenever I'm out of cell range I receive a notification that satellite connection is available. If you pay $10/month you can text any number, not just 911, but I'm too cheap for that.
https://www.t-mobile.com/news/network/t-mobile-text-to-911-available-for-everyone
Power helps if you have no LOS to speak of. Before I became interested in GMRS I tried FRS radios in our neighborhood, which is flat with thick foliage. Range was, maybe, 1/4 mile. A GMRS HT will do a ~mile.
But yeah, at the end of the day, elevation = propagation.
This. I can hit a local repeater that's about 35 miles away through moderate foliage with a 5W HT not because my radio is great, but because the repeater has a world-class antenna 400' AGL in flat terrain. If I get above tree level I can hit it from ~50 miles with an $18 CCR.