Ukrainians are still so strapped for artillery they're having to cobble together viable replacements for their dwindling forward artillery support
You know who anticipated the need for large amounts of self-propelled artillery? This obscure little country called the fucking Soviet Union, which developed a whole lot of SP artillery systems, like the 2S1 Gvozdika (over 10k manufactured) & 2S3 Akatsiya (around 4k). If only Ukraine was a former Soviet republic or something...
I actually decided to check this, since I assumed they must have inherited a whole lot of stuff from the Soviets, and was wondering what had happened to all of it:
After the collapse of the Soviet Union, Ukraine inherited one of the largest armies in Europe. Its armed forces had 780,000 troops, 6,500 tanks, 1,100 combat aircraft, and more than 500 ships
Wikipedia also adds a 7,000 figure for other non-tank armored vehicles (APCs and IFVs and so on, I assume these self-propelled guns would be counted towards that as well), although I'm not sure what the source for that is.
At the beginning of 2013, the Ukrainian military had downsized compared to its Soviet predecessor, comprising 184,000 soldiers, roughly 700 tanks, 170 combat aircraft, and 22 warships
They actually do still have around 300 of the 2S1, and another 300 of the 2S3, but I assume they probably had a lot more in 1991, given that the Soviets made over 10k of the 2S1, and it was even designed in fucking Kharkov, so they must have inherited some of the factories and tooling for it too.
So, uh, yeah, don't do capitalism kids, it's bad for both your health and your supply of tanks. Ukraine probably got rid of more military equipment in the 90s than they've received as military aid now. And yeah, sure, it was Cold War Soviet vintage, but if you're going to be using your tanks as improvised artillery anyway, what would you rather have - a hundred fancy Western tanks that weight like 60 tons and burn a whole lot of fuel, or a thousand economical Soviet ones? (and I don't think they've even gotten that many modern Western tanks, most of the heavier military aid has just been upgraded Soviet equipment anyway! stuff that Ukraine would already have if it hadn't disappeared in what I assume were various Lord of War-esque shenanigans)
Kadyrov says "touch grass". Or rain, I guess.