Good for you. The FANG (you can guess) company I worked for stack-ranked me at the bottom of the tar pit in my write-off year with zero increase in comp, followed by another quarter of intense improvement program after which they decided I still wasn't good enough. Disagreements ensued for three more quarters and then that was that. The result... unemployment.
I spent an insane number of hours in the middle of the night bouncing on a swiss exercise ball, holding the baby, in nothing but my pants, in the dark, with the tv on (but muted), to coax the baby back to sleep. Honestly ... this sorta stuff needs to mentioned more to let prospective parents know what they're in for.
Since having a child, I've nothing but total admiration for any single parent - how they manage without a fulltime partner would be beyond my ability.
I started to get some of my old coding mojo back around 8 months and at 18 months I'm IMHO better than I've ever been, but the newborn phase is basically a complete write-off. Parental leave exists for a reason.