Come on.

"The 1-35 was a competitive 15 meter ship until glass caught up with
it."

The 1-35 was never competitive. When it came out in 1973 it was
already totally outclassed by glass ships such as the Standard Cirrus.

This one example serves to illustrate that whoever wrote this article
doesn't know alot about high performance sailplanes.

This article is written from the perspective of someone who is content
to never go beyond aimless local flying. If that describes you, then
follow his recomendations.