How 'experimental' is the summary2() method after existing for many years?

[iamstatsman]

I am wondering how 'experimental' is summary2 at this point. It has been around for years, and, as far as I can tell, it is stable. Why is it listed as 'experimental' in the docs? Is it still 'experimental' or should the docs be updated? If it is still 'experimental', maybe someone can comment on how it is limited? Hopefully it will not present standard errors in the coefficients column or anything as serious as that!

[josef-pkt]

'experimental' mainly referred to the design of the method. There are some usability bugs in that some extra options don't work yet, but the numbers should be correct.

docs should be updated

It was a bit strange to have two summary methods, but both have advantages and disadvantage so neither one got dropped.