What is "fusable interfacing" and who uses it to make kilts?

[Paul Henry]

I've never said your garment are of low quality, I have no experience of them to make any such judgement.

My observations are based on many years working with clothes in a professional capacity, as both a tailor and cutter.
My tutors showed many examples of all sorts of interfacings and linings fusible or plain, woven or not, and what would be expected after years of use.
They were always of the firm opinon that bespoke clothes deserved the best , both in fabric which could be seen and that which couldn't be.

You've had good experience of using fusible products, that's great, but it's not everyones experience.

[Dixiecat]

You've had good experience of using fusible products, that's great, but it's not everyones experience

I hate to beat a dead horse, but it's not your experience you're basing an opinion on. Old, beat-up clothing and your tutors (who may or may not have had a vested interest in teaching you tailoring) showing you samples of what to expect when you use a fusible are not the same as actually using the product.

The fact remains, fusible interfacing, chosen correctly, applied correctly will last many years with nary a problem.

I am not trying to push fusible interfacing on you by any means, your craft is at a level both higher and older in tradition that fusibles, but pushing a negative opinion on something that you don't have actual experience in using is just not right.