Do you use plugs or solo cups to start? Or from one to the other? If using solo cups I hope you use the tall ones. Not sure if you have yet, but I encourage a side by side of your usual start size and something bigger/deeper such as a 1 gal pot.
The seedling's taproot is obstructed in anything under 4" or so, I prefer 6". I found they may sprout slightly sooner in shorter but will also stretch more and have weaker growth. Not to mention at this young age it is mostly the roots doing all of the work, setting the foundation for strong foliage to come. Instead of being handled/transplanted unnecessarily, the seedling would be building a substantial root base. Most people would be suprised at how early in life a seedling fills a 1 gal pot
If people are looking for more fibrous roots, or their seedling is rootbound, they should score the rootball when they upsize. But let the taproot work its magic first