It is, I looked at several vendor's and it's all te same except for the nice gui.
They all have their own blacklist that they feed with the spam/ham queries from their devices.
Personally not, I primarily use Samsung but hear from colleagues that they had issues with other brands.
The other thing is that there are only 2 brands that make screens, Samsung and LG. Those screens are used by all the other brands as well.
They don't have to cost money.
The mail filter appliances are all based on postfix, spamassassin and a virus scanner like clamav. The thing you pay for is the nice gui.
First: You shouldn't care about what others think.
I can understand why your husband thinks it's too late for him. I am also in my 50's and my daughter has a 6 months old son and I could never do that again. It's not just now but if that newborn is 20 your husband is 71.
That's why you know that the "real" Christian's never have read the bible from cover to cover.