11 titles for the first quarter of 2024 puts Nintendo on pace to add 40-45 titles to NSO this year, which is actually the most common total for releases (occured in 2019, 2021, 2022, and 2023, with 50 plus in 2023). I made some bar charts yesterday for personal use just to visualise how these releases are working and was surprised at (bar 2020) the consistency in hitting 40 plus games each year, even as support for individual systems fluctuates. My numbers don't count SP releases and are for the international service (outside Japan, basically).
Expansion Pack support has also been consistent numerically, with 29 titles in 2021, and then 28 each in 2022 and 2023. Big question there is what Nintendo will do without Mega Drive titles - last year they still added 8 Mega Drive games, and it's difficult to see them making that up with N64 and GBA alone. More broadly, the Expansion Pack also lacks a replacement for Mario Kart DLC, so the ongoing additions for the service are in danger of being weaker this year.
Base tier support increased last year thanks to GB/C, obviously; the base NSO offering hasn't had more than 20 titles since 2020, when it had 20 exactly, with 24 being added last year plus F ZERO 99 making it a pretty decent year for base NSO. By way of comparison, 2020 had 12 titles added and 2021 had 13 added.
So far this year the split of releases favours the base tier outside Japan, with 7 base titles and 4 EP titles added. It'll be interesting to see if that split continues, and Nintendo try to make up for a weaker EP offering by making more use of their GB, NES and SNES libraries. Given that the Japanese service hasn't seen that uptick in base tier support (thanks to the Rare titles being international only), it's difficult to know if that's going to be the strategy. It could just be a quirk of the titles Nintendo have available right now.