Timed commands

I would love seeing a way to easily set off commands in a datapack at set times. I'm not sure if that sentence made much sense so I'll elaborate with an example. Say I want a command to be run after 10 seconds. I would have to use a scoreboard objective and add 1 every tick to that score until it reaches a certain amount. But with my suggested change, all you would need to do is type: /execute after 10 s run say "Hello world!" This would make the process much easier and less confusing because we wouldn't have to type 5 long commands.