The tight temperature range is something I very much agree with you on. I think climate conducive to their growth play a big factor in disease immunity as well. I’ve seen them thrive like weeds in sub tropical regions. But for some reason, even in controlled conditions, they fail to do that well here in my area.
Going for some locally adapted strains is a great idea. Thanks for that! I’m actually a terrible gardener so I hadn’t thought of it. I just used what little seeds my neighbour gave me, and in limited area because I tend to prioritise fruits over veggies and they are what dominate most of my garden. The little space I experimented with tomatoes on is currently occupied by legumes.