I will just say three things.
The book I linked to was written by Ctein. Ctein is not only a photographer he has a physics degree from Cal Tech. His partner for the enlarger lens section of the book is a photographer with an Ivy League physics degree. There are opinions and then there are opinions. There are books and then there are books. I couldn't do my day job unless I relied on opinions and books. As with any serious endeavor in life you have to be able to evaluate sources. You can't just lump in all opinions and books into one category. I personally have never seen such an extensive evaluation of enlarger lenses from other sources and I have never seen anyone reputable debunk their findings. And if there was an opposing opinion I certainly would want to read it. I have no loyalties or biases. I go where the findings take me.
I agree with the method of trying it out and seeing if it meets your standards. The problem is if you are working from a position of total ignorance as I have on many occasions there is no way to know whether something really does satisfy you unless you have something to compare it to. As I said I scanned my negatives for a long time and only when I actually compared my workflow to the gold standard darkroom workflow did I realize there was an issue. If years ago someone said you can spend $30 extra dollars and get a definitive answer on day one I would have taken the option. I am trying to save people some pain.
I must emphasize that the only reason this conversation is even happening is you can get one of the best enlarging lenses for 35mm film for $40 or less in mint condition. I approach photography the way I approach the rest of my life. Once the sum of money that is being discussed gets so small I just pay my money and expend my energy worrying about more complicated issues. The converse is also true. Once the sum of money gets so large there is no way I am going to part with that amount I just keep it in my pocket and use whatever "inferior" device I currently own. Everyone has their cut offs. I personally never got involved in the APO wars because a single used APO lens costs more than my entire darkroom setup with two enlargers and two lenses... Well the Zonemaster II broke the budget... but other than that late addition. LOL.