First off, this was mainly an issue with the earlier packs in the Model S and X the first few years. I don't think there have been many reports of this with the newly designed Model 3 and Y packs. But then again, the Model 3 has only been out since 2018, so there is less data.
Anyway, do keep in mind how impacting this effect is. On the old S and X, 120 kW was about the fastest they could charge to begin with. When they started to get charging speeds reduced to about 90 kW, there was wailing and gnashing of teeth.
With the Model 3 and Y, they are designed for almost 250 kW max. If they got a similar one fourth reduction, that's still like 180kW. That's still a really fantastic charging speed! So even if the 3 and Y do start to see some capping of their max charging power, it's not going to be nearly as noticeable or inconvenient.