@Johannes7
On the Mac my recommendation would be to use 1Password 8 to fully immerse yourself. It is possible to keep both but it can create some confusion especially around the extension and 1Password for Safari, and I use both each day. The same can be said for the iOS device to a smaller degree. However, if you use the 1Password Apple Watch app I would recommend keeping 1Password 7 installed on the iPhone.
- Provided all of your data is available on https://my.1password.com and ensure you have a copy of your 🚒 Emergency Kit you should be able to remove 1Password 7 from the Mac and the iPhone.