Most certainly not too late. This is actually faster than expected, leaving about 15-16 mil of compromised units of a small subset of them actually available for negative use which can now no longer be safely bought into as the months pass, curtailing the longterm market.
Of a system that's going to sell probably 70-90mil, if not more.
It doesn't matter if Switch will sell at the end of its commercial life 120 million of units. There are still 15-16 million of units with the potential of ruining the online experience.
People is talking a lot about 'Splatoon 2', but I can't care less for multiplayer games.
I'm the type of person preferring single player experiences.
Because of this, online leaderboards in arcade games are an essential part of the fun with Nintendo Switch.
As soon as tools to edit save files in the games start to appear, goodbye to reliable online leaderboards in most of the games.
Unless Nintendo is able to find an effective way of preventing any connection from hacked Switchs.
Also, a single uploaded hacked score in an arcade game can ruin the experience forever, it doesn't matter if you later ban this user.