This brings back a lot of memories. I remember when I first saw that Avast UI in a PC shop, and I was like, WTH is that and that guy told me, This is Avast, the best Antivirus in the world.
I didn't even remember that I actually tried F-Secure back in 2010. The UI just reminded of that.
Seeing the older UI, I just also remembered that back in 2012 the head of Kaspersky's official distributor in my country sent me a boxed copy of Kaspersky. Then a week later Bitdefender offered me a free copy too for a reason which I gently declined as I already had Kaspersky.
I actually like Bitdefender and Norton's older dark UI over their latest ones. I used Norton for 2-3 years back then only because of the UI, lol.