More like because the hardware cost is much higher.
Devs work on an open source project. They usually don’t expect to get paid for their time, so the fact that “python allows for more features in the same time” doesn’t play as much of a role (I don’t even think this is a fact, more like a theory).
The hardware does have to get paid though. There’s no one out there building servers and generating energy for them for free. So less the hardware costs, the better.
Instances AFAIK run on donations. If there are not enough donations to keep the servers up, there is no Lemmy.
Reddit could afford to be on python because they ran on VC money and made losses year after year. I don’t think that a donation-based platform can afford that.
Cat girls are not furries. And I’m willing to die on this hill.