LT-Spice is absolute trash and basically why I decided to leave EE for CS in college... among many other reasons! Essentially, because after learning all kinds of math my linear systems prof basically said "yeah, at some point you just have to simulate everything because the math you learned only applies maybe 60% of the time". Granted, I do not think I was exactly destined to be a great electrical engineer.

Electronics simulation is fascinating, especially given the AI models used to do this. Layout gets especially complex when rf-traces / layers have to be considered or when you want to have an arrangement of traces to high bandwidth components all be the same length. Interaction between multi-layer vias is also insane (the guy who built the UberTooth1 bluetooth hacking dongle has a great defcon talk on the subject).

The best analog I can come up with is the debate / discrepancies between the US and European weather simulation models. Fascinating space, I got to work a few feet away from the Julia team at the Harvard Launch Lab way back in the day at a college internship. Of the few interactions I had with their team they are great people and unbelievably brilliant. If any of you are reading this, my hat's off to your engineering abilities - I'm still impressed by the fact you guys identified an error in intel's x86 instruction sets and yeeted the issue in less than 24hrs.