Not a dad but a few sets of pushups and air squats throughout the day. Pulling requires gear of some kind so 1 set of pullups on a bar when home. Most can squeeze 1 minute of time for a set of body weight work here and there. Long walks for cardio but that takes time unfortunately.
Yea, little micro workouts (completable next to your desk) throughout the day are great. I find most habit hacks questionable and/or too situational, but "habit stacking" works pretty well for this. Every time you test/compile/deploy/etc do 10 pushups next to your desk.
Still use vim. I use windows at work so old vim is better. Not sure if it's still true today but vim has better windows support. I remember neovim developers celebrating all the windows code they deleted. Congrats on deleting windows platform support I guess. :-|
Rust lives in the smart pointer world. So a good candidate as a c++ succesor. Zig lives in arena alloc and soa world. So it's a better than rust when you need performance beyond the norm.
Double kettlebells. Clean/press/squat complexes. Pullup bar. Walks if you don't have much walking in your daily life. All you need.
I think people getting into fitness focus too much on endurance, neglecting strength and it's bone health and connective tissue benefits. Lifting itself + long walks will give you all the cardio you need and then some.
Lots of of sport trainers are starting to see the light. Thai boxers traditionally ran themselves to death. Most of the top coaches and athletes are cutting back on that in favor of resistance training. Of course cardio is a pillar of fitness it's just many athletes neglect the other pillars.