You're talking about the hardware. That is critical.
But what's evolving even faster is the software. And in real world use cases.
They arent paying for tank models and people to run around and try to chase to "test". They are very literally doing it live, with live fire testing day in and day out.
Furthermore they are rewarding results on both ends. Successful operators get to buy gear for kills in an amazon like store (talk about gamification). And there are paths for "innovation" to make its way to the front quickly: see https://united24media.com/war-in-ukraine/how-a-ukrainian-gam... for an example.
Precisely, they both go hand in hand.
Ukrainian society is also very bottom up, and individual units are empowered to procure what they want, based on price or quality, from online systems that operate like Amazon. No general issue, just customization all the way to soldiers getting to choose from a wide variety of drone models from many manufacturers, and the manufacturers are competing to supply to the needs of individual units:
https://youtu.be/zlSMz_vtSwg
US military leadership is all about empowering units to solve problems on their own, at least whenever I read their books that's the message I get. Ukraine seems to have taken it even further.