It matters if you can team, at the extreme ends.
Actually no. You can regen on a cycle of fractions of a second. It’s hard to maintain around 1 second or less (manually) while you’re farming but it can be done for a few minutes at a time.
If you can get a bomber they can regen essentially non stop and you never have to let off the tool. You can fill both inventories (bomber and swinger) in a couple minutes.
6 - 8 players can lock down a planet this way 
Yeah I’m definitely talking about stationary block farming. There’s no reason to be using regen bombs while mining 
If you have a partner, this is the way. If not, starberries. Or persist, if you are farming for blocks. Having a dual bombing partner adds a good amount of flexibility regarding both buffs and offhand options.
EDIT: Going to put this here for people who don’t understand what I’m talking about.
Adding a partner with a regen bomb in one hand and a set of heal/replenish bombs in the other hand (only need level 2 forging for this) means that the tool user can go non-stop with any configuration while their energy is endlessly replenished.