I have an SE and appearance aside I disagree. It had the guts of the current model including touch id and performs quite well for me.
Now, sure, it feels a little bit left behind. Maybe. It's still fast enough to run the apps I want. But, let's face it, all of the updates that the 7/8/Xfoo have had are updates I don't want.
The problem I've got with Apple is that they don't have any new products I want. I just had them replace the battery on the SE (which was a clusterfuck in its own right) and I just bought a refurb 2015 MBP. Granted Apple probably made more money off the sale of a refurb than they would've off of a new unit... but if the lineup hasn't improved in another six years I'm off to Linux on the desktop.
IIRC iPhone SE does not have the second generation Touch ID sensor that iPhone 6s does.