Re: For those who build your own, which table saw?
Teeth on a saw blade primarily determine the fineness of the cut and how much shear force is exerted in the wood. More teeth equal less splintering, cracking, and shearing. Some wood I've cut required 60+ teeth to get a good cut. Plywood often splinters badly if regular blades are used. This is why plywood blades typically have very high numbers of teeth.
No the number of teeth does not make much difference.
I've used a 16 tooth blade on my tablesaw to cut pine, but prefer between 24 and 36 teeth for most woodwork. If I were building furniture, I would want 36 teeth or above, especially if the wood splintered easily.
A very sharp blade reduces hp required. This is one place where I see a lot of mistakes. Either keep your blades sharpened or purchase new blades that are super sharp. It will save a ton of time and effort and reduce risk of injury when cutting wood. I save old carbide tipped blades for cutting down supers and such where nails are likely to be hit. This is the only time I deliberately use a blade that is not in excellent condition.
NW Alabama, 46 years, 24 colonies and growing, sideliner, treatment free since 2005, 14 frame square Dadant broodnest