Knock on wood my "little" setup has been fairly stable lately. Not the fastest, but stable.
Underground lines are great, but not when they where installed long before dsl and cable. No one even wants to touch this mess.
Mine are underground, installed around '90. We buried an extra six inch plumbing pipe just for cabling to the house. The "promise from the city" at the time was that the entire area was going for underground utilities and very "sanitary" look to the neighborhood.
It never happened. I have a pole on my streetside corner that feeds "everything" in four directions, Honestly, it looks like some kind of "'rigged" together crap that one would see in a third world country.
Fucking HATE that horrid pole and the destruction of my view of sunsets that results.
So going to our twenty something year old house, we are clean, but everyone else needs to enter the late '80s tech!!