I see another possibility arising though, one where the code is amended to allow (perhaps regularly occurring) decimal shifts and perhaps even gradual block size limit increases. The latter is personal speculation, the former is something Satoshi himself said may happen: https://satoshi.nakamotoinstitute.org/posts/bitcointalk/46/

Bitcoin was designed with the ability to do micro payments thanks to the fact that 8 decimal division was built in from the beginning. But micro payments will become more difficult if the network continues to rise in value without decimal shifts to allow further division. Imagine if there were a BIP within the next 7 years that ensured that the block reward never dropped below 1 "Bitcoin" because the entire network instead has a 0 added to it. A limit of 21,000,000 becomes a limit of 210,000,000. All wallets would show a balance that was 10x the previous balance, effectively performing a 10 to 1 split of the entire supply equally, while the real result is that divisibility of the block reward is immortalized as having 8 decimal points of division.

In a system where these decimal shifts occur automatically, whenever the block reward would otherwise drop below the decimal say every 2 - 3 halvings, it would mean the network would never stop providing a block subsidy and will continue to double in value against energy input via the mining network in perpetuity.

There would be no worry of lost coins as there will always be more division, effectively this regularity of division makes the total supply of money meaningless except for the fact that the fixed limit on supply growth means it will never be debased, and people could more intuitively understand that the value of their (and everyone else's) savings will grow at least 10x+ (my math actually says 20x+) a decade if they just save more.

The majority of wealth in Bitcoin will never be spent. The majority of wealth will always be saved for the future. Humanity will learn to live more frugally and spend more time with each other and follow more meaningful pursuits than we do now. The world will be a better place for everyone globally.