Riddle me this:
I always head up or down, straight or in a spiral.
Jacob dreamed of Heaven via me inside the Bible.
I never head sideways, as that is a different way.
When home alone, Kevin rode down me on a sleigh.
Going up, I have a flight, but never have I wings.
Climb me for a while, and it might hurt your hamstrings.
I do have a replacement that will lift you to the higher;
Though you can never use it if there is a fault or fire.
My names differ, ending with a case or way or well.
Find out what I am, and other beliefs you may dispel.
This riddle might prove to be easy,
But to answer it, you will have to think steady.
There is also more than one clue in the title.
This is the classic style of riddle that I usually write in, and I decided to write one more like it as to celebrate my $20$th riddle created on the Puzzling Stack Exchange!
This is the $19$th riddle I have posted, but there was a riddle I wrote as an answer (over here). I made this riddle relatively easy so people who are not very great at riddles can also enjoy.
In celebration of my $20$th riddle here, not only will I be accepting the correct answer, but I will also be awarding the user another bonus: $100$ of my reputation!
An added $50$ of my reputation will be credited to the user who does not give the correct answer, but is very well-fitting and might pass as an alternative.
Unfortunately, I would have to wait $2$ days in order to award the bounties, but that should be enough time to answer this riddle. Hints are below.
Did I forget to mention my relative, the escalator?
And to be more specific, my replacement is __ ________.