But serious question: Are you considering "upcoming" technologies like BitVM and Ark? Many of these solutions depend on, or are drastically "facilitated" by
covenants which is actually one of the hottest topics among the Bitcoin devs, and once it is implemented, then the L2 situation could drastically improve on Bitcoin.
I haven't read about this tech, I think there's no point if Bitcoin L1 is so limited by the protocol.
But I'm not interested in tech that isn't out yet - too many promises have been made over the years, and most of them turned out to be worthless (just look at LN).
So, when I see "Upcoming" what I really see is: "We got nothing".
I will read more into it when it comes out and matures a bit, so all shortcomings and bottlenecks unfold.
Monero could also be a good "prepaid card" replacement, but be aware that it also has bandwidth limits. If Monero was the only "payment coin" and its block sizes would explode, even if it has a dynamic block size, it would lose decentralization. I would love XMR to be used much more though, and it still seems to have leeway.
Yes, Monero is limited by infrastructure as opposed to being limited by the protocol, like in Bitcoin.
Would decentralization suffer? Sure, but only a bit - many people have fiber connections nowadays, and hard drives are cheap and getting cheaper.
Statistically, many people still run on slow connections, but these people probably haven't even heard of Monero.
I use a 5G network for my connection; it averages 600 to 800 Mbit just by connecting my phone to the laptop.
The point is, Monero is ready for the future with its protocol, while Bitcoin is very limited so it can run on outdated computers that don't contribute anything to security by being just passive nodes.
Internet infrastructure is only getting faster, personal computers are getting more powerful, and almost every kid today has the computing power of a supercomputer from yesterday.
Using Bitcoin today is like using Windows 3.11.