Curiously, the UTXO set size has stabilized since about 5/2024, with a minor peak on 12/2024.
The rate of new inscriptions has slowed down, but I'm not sure that's the only reason. There's a local increase in the rate 2 months ago but it hasn't negatively affected the UTXO set size, which actually dropped a bit.

Inscriptions per month:
2024/01 6.51M
2024/02 3.62M
2024/03 4.08M
2024/04 3.67M
2024/05 0.61M
2024/06 0.93M
2024/07 1.52M
2024/08 1.46M
2024/09 1.14M
2024/10 0.68M
2024/11 1.73M
2024/12 2.51M

2025/01 2.84M
2025/02 4.19M
2025/03 3.76M
2025/04 ...



https://statoshi.info/d/000000009/unspent-transaction-output-set?orgId=1&from=1672524000000&to=1745009999000