The sooner all blockchains start to implement these measures, the better it is.
It is imperative that we do not underestimate the risk of quantum computing to cryptography. We have very little information about what QC research is being done in countries that want to destroy Bitcoin.
Many people say a few years off, but sometimes these things can happen a lot sooner than expected,. The crypto community gets blindsided and puts several years of progress on many reputable blockchains/forms of DLT into disrepute.
Obviously, I do not want this to happen, more than just from an investing perspective. Hence, being proactive is better than reactive.