I'm surprised nobody has mentioned Starlink. I have been roaming all over the world now for well over ten years and I regard data as an essential service - just like gas and electric. All our TV is now via internet, and our monthly data bill is around 100gb if I am careful, and 300gb if truly unrestricted. For this I am willing to pay up to around £75 a month, but it is rarely that high. I run a router and a phone, and getting the best local deals is all part of the fun. It is occasionally frustrating, but sometimes surprising. Currently in Turkey which has ridiculously complicated deals, but I have ended up paying £15 for 100gb which is excellent value - but it took 3 days to sort out and needed the help of a local.
But Starlink will be the future, I would pay £100 a month for it now, but the Starlink RV equipment is still too bulky for my liking, but technology moves fast and I am expecting a small dome on the roof in the next couple of years, and the price will fall once the other constellations go up, can't wait to see the back of sim cards!
As for network reliability, I have found it so good that I can count the number of days with no internet in a year on my fingers, I can manage quite happily on 3G, and in some places 4G is so congested that switching to 3G is faster.
When in the EU I generally stick with UK roaming deals, it costs a bit more, but not having to use a VPN is worth the extra. On the way to Turkey we used a 3 sim via the Smarty network - it has the usual 12gb limit, but for £7 we could get unlimited and as it turned out unrestricted (fast) internet for 3 days, which is a theoretical and expensive £70 a month, but we found we didn't actually need it 24/7 so it came in well within budget. And now we are out of EU I just cancelled it, and can restart any time in the next 6 months, I know there are better deals, but we were so impressed with the constant high speed we were happy.
But the future is definitely in space! And the networks know it - they must be worried. I have a friend in France who is on Starlink fixed and he loves it.