I'd like to give a perspective that you can take with a grain of salt.
I've never played a Dreamcast, but I have played an Xbox a few times.
I feel like I would probably pick Xbox because of the Star Wars games (namely Battlefront and KOTOR), better controller (never used Dreamcast but the controller looks awkward and lacks a second stick and bumpers), and better specs.
Be that as it may, I'd buy a Dreamcast way before I'd buy an Xbox. The hardware itself is maybe about 20% more expensive and almost any Xbox game I want to play I can play on Xbox 360 or Xbox One.
Lifetime Sales Predictions
Switch: 161 million (was 73 million, then 96 million, then 113 million, then 125 million, then 144 million, then 151 million, then 156 million)
PS5: 115 million (was 105 million) Xbox Series S/X: 48 million (was 60 million, then 67 million, then 57 million)
PS4: 120 mil (was 100 then 130 million, then 122 million) Xbox One: 51 mil (was 50 then 55 mil)
3DS: 75.5 mil (was 73, then 77 million)
"Let go your earthly tether, enter the void, empty and become wind." - Guru Laghima
