Start things has always had Storage size limits
The contents of State and Atomic State are limited to 100,000 characters when serialized to JSON.
This should be more than sufficient for typical use cases. If you find yourself running into this limitation, you should evaluate your use case - remember, State and Atomic State are intended to persist small amounts of data across executions. It is not intended to be an unbounded or large database.
Even just one of my hue bridge configs is 111980, now this smart app doesn’t store everything but seeing as hue have added so much is the last few years I can easily see two hubs being enough to go over the 100000 character storage limit
Just checked mine is 23315 in Hue B Smart for both bridges but I have removed all default scenes and don’t have many I also have no other 3rd party hue apps added