Short answer: Yes, but…
Long answer: As Dave said, it takes time. You mentioned Lamplight City, which was my third commercial game. It’s done well, yes, but it’s the first of the 3 to actually make me a decent living (A Golden Wake still sells, but not nearly enough to live off and Shardlight was 1.5 years of salary) During the development of Lamplight City, I reached a point where I was running out of savings and had to get the game out sooner rather than later to start earning money. That was not fun.
Lamplight City has earned enough to sustain me over the past 4 years (especially with iOS and Switch ports) but sales have definitely dipped recently, which means Rosewater needs to come out within the next 6 months or so. The key is, if you’re a solo dev, you want to build up a catalogue as quickly as possible. Having 3 games that earn you money is better than 1. Dave is an outlier because he also makes money from the games he publishes, so take that into account.
So yeah, go for it, but don’t expect any miracles. And definitely don’t pour all your time and money into your first game, because it’s not likely to sell unless it’s got an amazing hook and gets lots of attention.
Long answer: As Dave said, it takes time. You mentioned Lamplight City, which was my third commercial game. It’s done well, yes, but it’s the first of the 3 to actually make me a decent living (A Golden Wake still sells, but not nearly enough to live off and Shardlight was 1.5 years of salary) During the development of Lamplight City, I reached a point where I was running out of savings and had to get the game out sooner rather than later to start earning money. That was not fun.
Lamplight City has earned enough to sustain me over the past 4 years (especially with iOS and Switch ports) but sales have definitely dipped recently, which means Rosewater needs to come out within the next 6 months or so. The key is, if you’re a solo dev, you want to build up a catalogue as quickly as possible. Having 3 games that earn you money is better than 1. Dave is an outlier because he also makes money from the games he publishes, so take that into account.
So yeah, go for it, but don’t expect any miracles. And definitely don’t pour all your time and money into your first game, because it’s not likely to sell unless it’s got an amazing hook and gets lots of attention.