It was intended to bring the existing Julian calendar in Eastern orthodox churches closer in to line with the gregorian calendar. It was not meant to be a universal calendar.
It's not realistic to alter the existing calendar in this day and age. The gregorian calendar was already too embedded in 1923 to change, and now it's globally dominant.
The only way to replace the calendar now would probably have to be a brand new calendar (to prevent confusion with the existing calendar, it'd need new month names for example) OR a global agreed change to the gregorian calendar.
Neither is likely; there doesn't seem to be a big enough need or benefit to get countries together to change this. They can't even agree on action on pressing crises like the climate crisis.
Interesting. Although I'd contend no one "celebrates" daylight savings. It's not a holiday, and unfortunately saying "it's not 9am in my house" probably won't get people far.
I do like the percentage clock idea.
I have a 24 hour analogue clock on my wall - one turn of the clock with the hour hand is a full 24 hours instead of 12. It really changed my concept of time in the day. 12 noon is at the bottom of the clock.
It always feels striking to see the clock at noon and realise how small the morning really is due to sleep and how much of the day is left.