Baggy Method?

[Starlight]

I had fermented and saved bunches of tomatoes to give away and for the MMM swap. Normally to test germination rates I will replant some seeds. This time I decided to try the baggy method. The one where you put the seed on paper towel and put in a baggy. First time trying it and oh boy oh boy!

Now I have oodles of little seedlings everywhere in these baggies and they have tiny first leaves of them. They not as large as what I get when starting in soil, but they have leaves and long roots on them.

The ones I enjoyed the flavor of, can I plant in some soil and will they grow good even if first leaves are teeny tiny? Do they do good or can I expect problems trying to transplant them since they have leaves and not just tap roots? I got busy and forgot to check on them.