Why do people through money in to wells, fountains, or other water features? Why do people send coins to any "burn" address?
Maybe as "thank you" or other tribute to Satoshi. Maybe for luck. Maybe just to they can they say they gifted some satoshis to Satoshi. Maybe as a symbolic sacrifice to pave the way for $100k.
But for sure we know any coins sent to this address will be frozen forever.
We don't know that. The original 50 BTC coinbase transaction cannot be spent, but as far as we know, Satoshi still owns the private key and any other coins sent to that address could be spent in the future. And even if not, then these coins could well move in the future thanks to advances in quantum computing. They are not provably lost.
Do you think that quantum computer will come into existence in the nearest future looking at the nature of Qubits how it can get destroyed by any kind of heat or even the environment? Considering the number of qubits required for a quantum computer to function or solve problems correctly something close to 100,000 qubits. And IBM is promising to build a QC with just 1000 qubits in 2023, which is not yet certain if it's a means of deriving funds from desperate investors.
From the recent news about how Quantum computers may not get completed anytime soon or at all I think those funds would stay there for as long as the development of quantum computers is complete.