Here is the link to the article:
https://strategy.channelfireball.com/all-strategy/home/whats-an-optimal-mana-curve-and-land-ramp-count-for-commander/Salient points:
"In recent years, I have seen various deck building templates that recommend around 36 lands in Commander. Indeed, the typical land count on EDHREC, according to a recent article by Magic Data Science, is 36. This would translate to 14.5 lands in 40-card decks or 21.8 lands in 60-card decks. Many Limited or Standard players would quickly recognize those numbers as a bad idea.
For Commander, based on the results of my simulations, my general advice would be to start with 42 lands plus a Sol Ring, then cut a land for every two or three additional mana rocks you add. You could also cut a land for every three or four cheap cantrips, such as Ponder or Brainstorm, and cut a land for every three or four mana dorks, such as Llanowar Elves or Birds of Paradise. But in general, for medium-power midrange Commander decks, try not to go below 37 lands. Missing your third or fourth land drop sucks, and you will stumble on lands far too often if you play fewer than 37 lands."
Curious to hear what people think about Karsten's analysis, and whether you follow similar heuristics when building your decks (and if not, what is the reason).
Personally, I find that my deckbuilding heuristic is not far from what suggested by Karsten. I never go below 37 lands (apart from some exceptional cases), and I usually play at least 10 ramp spells, most of which are 1- and 2-mana. I should specify that I count MDFCs as lands, as they are basically taplands that can be cast as spells later in the game.