In my experience root crops take more effort and are hard to get to a size equivalent to store bought. It's probably my techniques but I am a lazy gardener. While silver beet grows better for me than commercial crop.

With tomatoes I find bigger varieties are tasty targets for birds and other pests while smaller ones escape their notice and also crop over a longer period. Plus they self seed better and seem more resistant to pests. Speaking of which I once bought tomato seedlings from Bunnings but they had purple leaf curl virus which recurred the next year so I had to go without for some years to fix that. Never again.