If people actually start giving you number answers that you are asking for, it's going to stress you out, since the numbers are going to be, on average, much, much higher than yours.
There are a lot of high earners here who live in regions where their homes alone cost more (or multiples) of 800K.
Their numbers are, and should be, completely irrelevant to you. But if you are looking for reassurance that you've saved enough, you aren't going to get it with the question the way you've asked it.
At 800K, you might be in great shape compared to someone who has saved over 2M, it all depends on the details. I work with a lot of people who will be in trouble if they retire on less than 5M. Meanwhile, there are retirees here who live on less than 20K/yr.
If you want reassurance of your own, unique situation, then I recommend a case study where people can help you assess your particular plan and how robust it is.