The nice thing about this web site is it stimulates your interest in things you might never pay attention to.
WOW on youtube there's loads of home made track saws right up to all metal. One guy had the usual home made one and owned a Festool and said his go-to one was his 5 ft wooden one, simply because of speed of set up.

I helped a person side a house extension a few years back. Most plywood sheets went in full size. We had the usual wood home made track and it worked fine. But, most of our time was in cutting angle cuts. Our fancy trac jig was useless. We were back to measuring and using a straight piece of pine for our cuts. I think in a production shop, a real tracksaw would be great.