In fact, what other tech stock valued at double digit billions has had such a flat valuation for its whole lifetime, yet still survived?
Yes, a range of ~14-77, but it's neither taken off nor crashed.
Look at any other survivor and they'll be shaped more like Oracle, Cisco, FB&NFLX (well, recent troubles aside)
Look at them all over the last 9 years. Twitter stands out to me.
I dunno, maybe there are many big tech companies following the same pattern. But none of them are this high profile, so Twitter is the odd one out.