Customize contact list
Verizon's default android messaging app, while not nearly as useful & fluid as Textra, has a nice feature that Textra doesn't: it allows you to customize the contact list.
In the VZW app, you can customize your "primary contacts", meaning the contacts that appear in the default messaging contact list. Through the app's settings, you can create this list from any combination of on-phone contacts, a given group from Google contacts, SIM contacts, etc.
Additionally, if you type in a contact, the VZW app will still search through your full contact list (Google contacts, SIM contacts, etc.), displaying the contacts on your primary contact list first and then the contacts from everywhere else. Super useful!
This would be a lovely feature for Textra!