Anyone that tries to modify this will meet the strongest resistance. It is not a problem for bitcoin to have a limited supply because the price will keep going up with the demand, and the unit of account can be divided as small as needed. Bitcoin's inflation becomes almost unnoticeable by 2030, which is why by then, the price will be extremely high.
please explain this point further, what do you mean when you say bitcoin's inflation is predictable?
It is not, because we never know how many coins is lost that year. If none is lost then yes it is predictable. You divide number of freshly issued coins with all coins in existence. But to get real inflation you need to divide with only all available coins. Not the ones that people lose private keys. And there is lots and lots of such.