This shouldn't be a suprise. No one uses Zcash for privacy and the issuance rate is ridiculous--not to metion their team goes out of their way to alienate the prvacy community. From the moment they had a trust ceremony to Zooko's dumbass twitter comments this coin has been a trainwreck--Sapling is a step in the right direction, but without a complete reorg, the underlying problem (a complete disregard for what the privacy community wants from a privacy coin) will exist. Zsnarks were a great idea that fell into the wrong hands and became the plaything for a few spoiled academics who don't mind getting paid to waste everyone's time. Though the inability to audit the supply probably made it a terrible idea for a space the that coined the term "hodl"--though that and the trusted ceremony  should have been the only concerns.

TLDR: If the Monero team had created Zcash, the only concern would be an unauditable supply and the trust ceremony. Instead we have: issuance rate, dev tax, backdoors, trust ceremony, corporate coin, optional privacy (which gives you fungibility and low anonymity set issues) and an unauditable supply.