I'm very happy for RPi4 SD improvements. Until now, RPi has had same lacking ~20 MB/s SD performance from the start. AFAIK, this is the first time ever there's been any hardware improvement in this regard.

I've had a microsdxc card with 90 MB/s reads and 80 MB/s writes since early 2014. Some current cards can read & write more than 250 MB/s, so there's still room for improvement.

As 95-99% of all RPis boot from (micro) SD and use it as primary storage, I'd say SD performance is a rather fundamental (often ignored) aspect of RPi performance.

Of course you can. My tongue was very much in cheek :)

...but still, it was announced today, savour the moment :P