The question of impact of technology on attention span doesn't have an "Other" category and no comment field.
Mostly the thing literally being focussed on is technology, usually a screen.
Perhaps eye strain from monitors has an effect on attention. (You need to remember to blink at a reasonable rate) High refresh rate is also less fatiguing.
I don't see technology per se affecting attention span, but things like push content where we get bombarded with unrequested content, spam, updates and ads all are definite distractions and time wasters.
Even Windows doing unrequested tasks in the background can mess up what I am working on.
I almost never use a mobile phone, certainly not for any regular tasks, so that isn't a factor for me.
Multitasking generally reduces productivity, more for some people and some tasks than others but is just something to be optimized for overall productivity and performance.
