Well while they're every large, they're essentially eating into their reserves all the time. So they can amass more things than Ukraine... for now. At the cost of any possible future for Russia basically.
Russia will be fixing this clusterfuck of their economy for decades after Putin drops, even if it was just of old age.
It's a good writeup (as one would expect) but Ukraine isn't in a great spot -- the reason they're better off than Russia is because Russia is a complete clusterfuck.
The Economist isn't neutral. Quite the opposite: they pride themselves on being opinionated. They might seem neutral only because those opinions regularly cross the traditional US left/right divide (e.g., they were one of the mainstream news outlets talking about Biden's diminishing faculties long before his meltdown).