In 2018, 50-60% of Monero hashrate was rumored to be from secret ASICs. How “successful” at warding off ASICs could hard forking a coin’s hashing algorithm real

In 2018, 50-60% of Monero hashrate was rumored to be from secret ASICs. How “successful” at warding off ASICs could hard forking a coin’s hashing algorithm really be if it doesn’t stop the ASIC manufacturers from building ASICs for any given algorithm? Also it seems clear that Monero’s purported “ASIC resistance” is very much a social contract — requiring constant vigilance to uphold — one which isn’t guaranteed to be strictly adhered to over the long run, particularly as the cost/benefit analysis gets murkier.