Just giving my own 2 cents and nothing more but I tend to agree 100% with this statement. Pfsense to me has better documentation & more smooth feel to the FW component while the modules they do support are natural to the product and easy to implement (Haproxy and ACME DNS/LE Certs, pfblocker to name a few).
My target Nethserver audience are small businesses between 5 - 50 employees (like a customer I’m working with right now) who are not yet 100% on the Microsoft train. Normally these businesses have residential/low end business class internet . When I am upgrading these networks and replacing those low end consumer ISP modems/routers I tend to use Unifi, Pfsense or some custom pfsense build. I need to consider not only my future use case/needs but also those who may come behind me to support these products.
When it comes to Nethserver in particular I find that sometimes it is hard for me to give NS my money. I can’t go to Firewall aziendale | Nethesis and look at available hardware/pricing or make any purchases on my own. I’ll admit that I’m most likely not the target audience for what NS is after but I can pass along some of my past experience.