There has been a lot of discussion here about solid, (airless) innertubes.
Many of us prefer the thick, thorn-proof tubes and tire liners.
Tom
I am one, I have what I call 'bullet proofing' wheels as an option I recommend for every new build.
~$25 a wheel for a quality tube and liner local retail per wheel.
I have pictures somewhere, but an HD tube is like 4x thicker than typical retail bicycle stock tubes.
Just a note about tubes..
Like a balloon, they all loose air through permeation, the thicker the tube the less air it will leak just sitting there.
And just for giggles and grins...
You can fill your tubes with nitrogen.
It is a denser non volatile molecule that doesn't permeate through rubber as fast.
Liners are king in my book.
They won't prevent a sidewall puncture but will sure stop any of the usual things we encounter.
Tires wear out, good tires count at the speeds we ride but paying more for them to be supposedly 'tougher' sounds like marketing to me.
All I know is I occasionally refit a customers bike with new tires and with the 'bullet proof' wheel builds the worn out tires are filled with nasty's you can feel inside the tire but didn't cause a flat and I can reuse the HD tube and liner with the new tire.
It's a reusable $25 investment I highly recommend for at least your back wheel as it really sucks to have to repair a back flat on the road.