Been using YahooFinance every day for over 25 years,
mainly using a Desktop browser,
but not nearly as much as I used to.

Every since removing the "Classic" version of Yahoo!Finance,
I more & more rely on other on-line options to manage my large portfolio (80+ securities)

Yes, there has been some really amazing features added to the once "NEW" Yahoo!Finance,
but overall I have basically moved on because of the "Royal Pain" the new version has brought to me.
(now using separate spreadsheets , paid subscriptions to other online financial sites/services , etc)

Today, it took me least 60 seconds to change the shares & cost-basis of just one lot (only 1 row).
It is so convoluted to change the two values and have it remembered by Yahoo!Finance.

My main complaint, it takes FOREVER to update a view using a desktop browser.