There was a popup that told me a major update was available for my Avast Free. It was Avast One.
Is Avast One indeed the next version of Avast Free? Or is it yet another upsell tactic?
I certainly hope not.
Previously (when Avast One was released) Avast have said that Avast One isn't a replacement for Avast Antivirus, they are two different products.
The reason I installed Avast for its configurability. Avast One doesn't have the same configurability (from what I can see) it has different components which aren't full versions, which may lead to offers for Avast One (paid) and not for Avast One Essentials (aka Avast One Free).
Personally I would resist the offer, if you tried it and didn't like what it offered, you would have to do a clean reinstall to get back to Avast Antivirus.
Note I haven't seen this offer, but my renewal for avast antivirus isn't for a few months.