I have tested MacBook Pro 16 inch on Big Sur 11.2 - only the release date is 2020 november (my laptop 2019 december) - and it has no Slow UI, input, cursor stuttering lags - . Apple must replace such notebooks - but instead - the authorized service center said that everything is fine all the tests pass

the cursor stuttering bug is still not fixed for MacBook 16 inch BIG SUR 11.2 - Apple doesn't seem to care about us - it hasn't been able to fix the bug since the macbook pro 16 inch was released

yes, the interface ceases to slow down when switching graphics - well, the question is why should I pay for the laziness of the developers with the laptop autonomy by using radeon videocard

In fact, apple can't fix interface lags and jerking arrows, input delay, delay in drawing the interface in the new macbooks pro 16 inch from the moment of their release - it is unacceptable that the device for so much money can not peform normally - any cheap laptop does not have input delay and cursor jerking/stuttering - if you switch to discrete graphics all problems disappear - well, apple is indifferent to these problems, it has long ago turned into a money making company - since the release of this laptop, everyone I know who has the same laptop has the same problems with it - the tone of the reports is open about this problem - and still there is no fix and apple does not want to recall these broken laptops - then that it earns money and does not care. The problem is actually in the video card intel hd graphics 630 - when you do not do anything with the interface - its frequency is 0 - and when you open a new window or print a video card does not have time to increase the frequency from 0 to 300/400 mhz - apple need not lower the frequency to 0 - but they can't do it because then the autonomy will suffer - hence the conclusion - there is a design error of a new macbook or an unoptimized ui which at the moment requires a lot of resources - there are no such problems in windows via bootcamp. But, it's not really our problem we paid a lot of money for a properly working device.