I didn't renew my membership with the USGA (they're starting to piss me off with how organizationally stupid they're getting), so I didn't get my 2019 rule book yet. I do know a lot of rules changed, I haven't memorized all of them yet, but I do know that most of them were dumb and/or solved a problem that didn't exist (especially this dropping from knee height nonsense). This reads more of an acknowledgement that locals can do a max stroke limit, but still invalid for handicap obviously.
The USGA really went off the rails. Some rule changes are good but the majority are just plain idiotic.