How about the 19th century problems - London Horseshit covering every road - solved by the invention of the car!!
Things that have gone.... Horse buggies, whips, horse rails etc.
How about the 20th century problems - work for 1 Company for life - gold watch etc... Changed by internet and computers
Things that have gone.... Fax machines, normal phones, offices in CBD's
We are now in the 21st Century
Things that are normal - Work from home, apps instead of Movies etc...
Things that have gone.... Serviced offices, Co working Space, Shopping Centres etc... biggest expanding franchise "For let"