It's not a drop-in replacement (even though it tries to sell itself as such), it's incompatible in a significant number of ways and throws away part of your data.
We use Victoria Metrics in Prod for more than 6 months. It is very reliable and scalable. Victoria metrics handles more than 2B+ series in our setup without breaking a sweat.
They made some pragmatic optimizations by dropping part of the data where it mostly doesn't matter. Who's actually affected by this? 0.01% of users?
No, it's better. You can focus on the thing you're measuring rather than the bloody platform.