I guess I was not clear. I was not talking about boats built in a shipyard but home built boats, literally on the backyard on a shed. But there are many that build them with chines on a shipyard and again, all OVNI line, that is hugely popular and are obviously built on a shipyard and very professionally have chines. That allows them to reduce costs and the price of the boats without a significant loss in performance.
Anyway it is more of a aesthetic preference than anything else. Some years ago I didn't like it...now I am used to them.
Since we are talking about amateur boat building and I believe that it is the main market for steel boats as well as for some aluminium ones I would like to post about some French NA that design for amateurs (and shipyards alike) mainly in Alu but also in steel. I believe it makes sense on this thread.
I will begin with François Lucas and his Hermine series, very popular among amateurs and that can also be built professionally:
naval architect nantes yacht designer racing sailing yacht cruising yacht motor boat workboat Réalisations - Designs Croisière
The Hermine 36 and the 40 are the more popular for amateur boat building:
The Tp 44
and just for Classic 30 be satisfied let me put an Aluminium Lucas design without chines, even if most of his aluminium designs have chines. This one is not for amateur boat building but only for a professional shipyard.
The Aventurin 40
Regarding these boats the chines are more a convenience in what regards building easiness but as they are very well designed their negative influence in what regards boat performance are negligible, if any.
This was the NA that many years ago started the "fashion" of chines on open boats. When all boats have rounded hulls he designed a Plywood 40 class racer with chines, not vertical ones like the chines on the 60's but kind of modern ones, like they are used now. Everybody started to make jokes about the boat as a racing boat and about him regarding saying that the chines the way they were designed on the hull would better the performance. Well, the jokes stooped when the boat start winning races...and everybody went back to the drawing board again trying to understand why.