Nope…not a design flaw at all.
- Apple most likely just decided that many folks no longer wanted to carry around a big heavy 17" laptop.
- 17" Apple laptop sales probably were dipping for a long time…and it wasn't worth the effort & corporate resources to continue developing them, manufacturing them, and reserving space for them in Apple Stores. Basically the return on investment wasn't there.
- Folks for a while now have had other more convenient mobile computing choices (iPhones, iPads, etc.).
Sure…there are folks who want/need 17" MacBook Pro's for their mobile computing needs…and REALLY appreciate that 17" display!

There just aren't/weren't enough of these folks to justify the continued development/support of 17" MacBook Pro's from an Apple business perspective.
For what it's worth…I love 17" Apple laptops. I've owned 4 of them over the years…and currently still have two!

But for most of my mobile computing needs (outside the home…internet & email)…I much prefer to use a 13" laptop or an iPad (or an iPhone…if I had one)

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- Nick