It's not impossible to change Bitcoin's supply, but there's zero chance the Bitcoin developers would get away with it. They can make whatever changes to the protocol they wish, but they can't force anyone to adopt those changes.
And yes, a lot of Bitcoin has been carelessly lost, but these are mostly old cases before Bitcoin had any exchange value. You've probably read about people throwing away hard drives with 1000s of mined bitcoins that ended up being worth millions a few years later. Hindsight is 20-20.
It should also be pointed out that a sizable chunk of Bitcoin is essentially frozen in Satoshi's wallets. Whether to count them into the supply is debatable. Same for Hal Finney.
And yes, a lot of Bitcoin has been carelessly lost, but these are mostly old cases before Bitcoin had any exchange value. You've probably read about people throwing away hard drives with 1000s of mined bitcoins that ended up being worth millions a few years later. Hindsight is 20-20.
It should also be pointed out that a sizable chunk of Bitcoin is essentially frozen in Satoshi's wallets. Whether to count them into the supply is debatable. Same for Hal Finney.