Adding my bump for this.
I'm a long-time 1Password user. I'm now using LastPass at work, and considering switching personally. I was surprised that LastPass lacked Diceware password generation (like 1Password has had for some years now).
Sure I use the more obscure (non-word) passwords for logins that I will never have to manually type, but there are many that I have to sometimes type. (I have to enter credentials on many types of devices that don't support password managers: Apple TV, Steam Link, my car dashboard, etc.)