> It’s always been interesting to me that multi-million and even billion dollar tech companies don’t have perfect websites in terms of UX.

This, but for online shops, especially clothing. Horrendously buggy, laggy, with broken navigation (especially when navigating back), filters that don't work on > 95% of online stores. Why they wouldn't fix their primary (or at the very least highest margin) income stream is beyond me, but I've had to abandon so many shopping carts just because the checkout flow is literally broken.