I voted clips are a requirement for a folding knife though they probably aren’t.
As it is I have a love hate relationship with clips. I love the convenience and I hate the unutilized holes.
Tip orientation doesn’t faze me too much at all and given the choice I position the clip so the blade is against the seam of my pocket front or back à la Military in back right pocket and the clip where it’s most comfortable in hand and I’ve not felt I need an after market clip for any knife I own.
I’ve also taken the clips off a couple of knife but found they looked strange without them and put them back on.