[kaiby]

Another concern is performance issues with box-shadow. A product I worked on displayed hundreds of twitter-like messages, each with its own box-shadow. Scrolling on less powerful devices would noticeably thrash. Disabling box-shadow improved it significantly. This was back in ~2012, so perhaps devices have become more powerful since then for this issue to be negligible.

[nsriv]

This is still a major design consideration for developing world mobile apps with webviews and sites, removing box shadows tripled time-on-site immensely for a site I designed for a client.

[seanmcdirmid]

Was this WPF by any chance? They really messed up on their drop shadow implementations, enough to cause a lot of performance problems that weren’t really necessary.