Monero has a tail emission that is currently sitting at 0.84% inflation per year similar to BTC inflation and about half of gold.

Inflation like in BTC decreases over time. But unlike BTC that reaches 0% inflation in 2140, Monero inflation only tends against 0% without ever reaching it.

It's bad for marketing purposes, because people cab easily claim infinite supply, while it solves a couple if things.

It covers lost coins over time creating a stable ecosystem instead of a deflationary system for BTC.

It solves miner incentives meaning the long term security is a given

It solves digital cash use cases with permanently low fees instead of a wildly fluctuating fee market that can discourage spending or might have unforeseen consequences like stuck transactions or forced close LN channels.

Think of tail emission as supply limited by time itself, while BTC chose a point in time making other trade offs.