I’ve been doing this since CoOViD. Previously I never used butter because it’s too hard from the fridge and “everyone knows” you need to refrigerate it.

However I started doing a lot more cooking, so it’s always been finished before it goes bad:

• FDA recommendation 3 days on counter
• “rule of thumb” 1 week on counter
• some streamers claim 2 weeks

I’m not even sure what “going bad” means for butter. I have seen it change color so the outside is darker than inside, and threw it out. But ive never noticed an off taste or smell.