I still feel that confiscating stale addresses is what will be done.
Banks already do this.
and goverenments allow it.
To be fair most people are interested in Bitcoin because it is not like what banks and governments do, therefore they consider this against one of Bitcoin's main principles.
But we can't really predict what 2026 is going to be like so we shouldn't leap ahead to 2079

Increasing Bitcoin's capacity by allowing more transactions per block is the direct route to higher fees for miners in the future but you can't actually ignore the downsides too.
Actually, more transactions mean more fees collected which becomes kinda a compensation as new Bitcoin rewards shrink. I think the trick here is doing it without making Bitcoin too hard for regular people to run a node which keeps it decentralized.
Whatever decision that is made has both advantages and disadvantage. Nothing is 100% good or 100% bad. The trick is always finding that balance to minimize the negative effects and maximize the positive.
Like I said the pressure for any of these ideas to be started does not exist at the moment.
But when traditional companies and governments are hodling a million btc right now maybe close to 2 million btc they will certainly not want the value of BTC to drop becasue miners switch to scrypt.
I also wish I were 25-30 and that I would live another 60 or 70 years longer than todays date as I want to see what they end up doing when the
rewards+fees problem come to a head.
Being 68 years old seeing a stale bank account getting held and locked is not a new thing for me. In fact I just unlocked one this year by
depositing 1 dollar and then withdrawing it a few minutes later.
It will be interesting to see what mechanism or mechanisms are used.