Your advice ran counter to what the OP requested in the first place, and you knew that it did, you made note of it. A cogent definition of "low magic" was provided (slowing things down or influencing the risk:reward ratio), and you sailed right over it with hardly a by-your-leave. It's true that the additional changes you want to make will shaft Sorcerers--and it's also true that the OP is perfectly fine with the party being made up of "exceptional" people who can cast spells. Why are you responding with such venom?
Not venom at all. Making a statement based on observed fact and experience is not "venom."
I said what I would do to make a "low magic" setting/game. I think at least some of that post (I would like to think "most") might be useful suggestions for the OP or others reading the thread/interested in the topic/idea.
After I did my sailing over without a "by-your-leave" [and why you think I, or anyone, would require such to post a response to a public thread I'm not quite sure,

but that's neither here nor there] I went on to say...Well, since you seem to like using out-of-content or partial post quotes to defend/"prove" your point, here's what I actually posted after saying I would remove them:
4a) IF you are going to allow Sorcerers or Warlocks as PC options, I would make it VERY clear and VERY intense in-game that they are pariahs! They are strange/unusual/frightful individuals and if they are caught using their powers, people WILL want put them on the stake. IF a reputation as a "known" Sorcerer or Warlock (the common folk and most nobles will not bother to acknowledge/accept any distinction) you will be persecuted at every turn. This attitude could easily be extended to Wizards...and even Druids if you want. But you need to make the players aware that THAT is the "low magic world" in which they are. That it will happen...just about anywhere/with anyone.
So, again, looking at the whole actual post, I did acknowledge what the OP said and after stating what I thought they should do, I presented an "I don't want to ban classes" option to use them but making it feel/seem appropriate to a "low magic" game.
Another option that occurred to me to present a low magic game was to make ritual spells actual rituals [only]. The fact that the sorcerer has ritual spells
does not matter. The fact that the sorcerer, along with any arcane spellcaster, is going to be "reduced" in power by making things rituals,
does not matter...and in fact, is pretty much the point! To reduce magic power and impact.
Turns out that's not the kind of 'Low magic" game the OP was talking/thinking about. And, ya know, that's fine. Doesn't make my ideas/suggestions/opinions any more "wrong" or more valid than any others in the thread.
To be fair, it was a bit hyperbolic/misspeaking of me to say "We all know..." Fair enough. Foul on me. Since, clearly, it is not possible that
everyone on the forums will have seen any of several threads (going back quite some time) about sorcerers in which KaiiLurker (now "Moonsong") has presented their side/views about sorcerers (and the 5e class in particular). So, apologies for that. I'll go edit that to "Some of us..."