Earlier quoted context omitted.
> There was no 1Password to LastPass importer at the time I wrote that The details were hazy, but in 2016, there was a way to export your passwords from LastPass and import them into 1Password, though I don't think there was a way to do so on windows (which I believe is what your importer addresses). After LastPass vulnerability in July 2016, I switched to 1Password.
There is, I just did it recently. It's an unncrypted copy paste dump from lastpass into 1password
If I recall, I had to sign up for LastPass premium to pull my passwords to my phone, and then use keychain to import them to 1pass.
I don't think that solution would work for Windows users back in 2016.