How long can I continue to use V1?
No worries, we won't pull the plug that easily. API v1 will remain online for the foreseeable future, we have yet to determine a date for sunsetting it. When we have a date, we'll post it here and it will certainly give you some time to switch to our new API.
By the way, API v2 is not al that different! Mostly, we've made the switch from ids to uuids. Furthermore, we've added all sorts of nice endpoints for you to use: NFT's, coin supply information and much more.