Not sure why I am eating the down arrows but I'd like to specify: I just tested on a few projects of mine and the binary size reduction is definitely more aggressive and better-looking compared to a year ago. Very happy with the gains! I am leaving my original comment above anyway since there's IMO still some room for improvement.

For comparison, without LTO and stripping I've had a fairly small hobby project easily compile to ~3MB and with them it's now ~800KB which is nearly 400% improvement. Nice.