"This site is NOT phone-friendly!" "This site is best viewed on desktop!" "This site is desktop-only and I don't care about smartphones!"
I see these sentiments on Neocities a lot more than I should like to. Like, I understand the sentiment: by creating our own websites using HTML and CSS (and JavaScript if you're sufficiently unhinged), we're taking a stand against the algorithmically-driven morass of social media and advertising schemes disguised as websites of the greater internet. We're trying to say "Hey, the internet was designed for information exchange, not data collection!" By creating our own websites like it's the Dot-Com Bubble again, we're resisting the corporate takeover of the internet in the only way we have available to us (without breaking the law, that is).
That having been said, a lot of us have conflated "smartphone" with "smartphone user". We see all smartphone users as the enemy, regardless of why they are using the smartphone or the tablet instead of the computer to access the internet. Let's tell it like it is: this "old web revolution" of ours is spearheaded principally by young, able-bodied, financially-comfortable, American white people. Even though we claim to have open minds, there's still the conceit that the "average user" is also able-bodied, young, American, somewhat financially-comfortable, and white. Therefore, when we envision a "smartphone user", we envision someone brainwashed by prolefeed, consuming heaping great portions of mediocre content, and giving out social media likes as though it's something practical. We envision someone who has all type of computers and shit around them and prefers to sit on the couch in their suburban tract-house and control their lives with smartphone apps.
In so doing, we fail to consider that smartphones are a linchpin of independence for certain disabilities. Phones provide voices for the non-verbal, access to basic everyday electronics for the paralysed, and yes even comfort for the autistic. We also fail to recognise economic hardship. In order to have a refurbished laptop to install Linux Mint or Debian onto, you need to be able to afford internet access, money for the computer, money for the flashdrive you intend to burn Linux onto, and a consistent source of power. With costs skyrocketing and wages stagnating or even falling, we can no longer assume that the "average user" has the ability to use a computer anymore.
The burden of change, therefore, falls onto us as web developers to make our sites compatible with, at the very least, mobile Firefox's Reader View. I'm lucky in that regard, as I don't have to do much. Being mostly built from old-ass HTML and a minor amount of CSS, my site is mostly accessible to mobile users, and my webdev process usually involves loading my site on my phone. My girlfriend also has very little to do there, because her site's template has mobile support included. But those of us making Frutiger Aero inspired sites, full of flexboxes and floating or dynamic elements? Your sites aren't mobile friendly. And, for the most part, you seem to be taking great glee at that.
"I'm not going to bother making my site mobile friendly; if you don't come here on a computer, I don't care about you." Well, I do use a computer and I don't particularly care about you right now, either.