The phrase "ago switched" is not correct and usable in written English.
It appears to be a combination of two separate ideas that do not work together grammatically.
Example: "I switched my focus to a different project a week ago."
Alternatives: "previously changed" or "recently altered".
He long ago switched to a special charge-coupled device, or C.C.D., camera designed for telescope work.
It's true that prime time programming consists mostly of filmed comedies and dramas and the daytime soap operas long ago switched to videotape.
While some makers still use buckets and do much of their work by hand, serious maple syrup producers long ago switched to a system of blue and black plastic tubing that makes their woods — known as sugarbushes — look more like outdoor laboratories.
The shortage of anti-Christmas atrocities (plus the fact that the U.N. fanatics long ago switched to subverting Halloween) may explain why he has concentrated on department stores, many of which, in their ads or via their salespeople, wish people "Happy Holidays" instead of — or in addition to, or more frequently than — "Merry Christmas".
Newey's greatest quality is his vision, and it is demonstrated by the fact that he still uses a drawing board and pencil, while most F1 teams long ago switched to computers.
Also, they long ago switched away from the annoying del.icio.us domain name, so I don't have to look up where the dots go every time I visit the site.
A couple of years ago, switching away from Google would have been a bit painful, but now there are products and services that are roughly as good and sometimes better.
Anyway, I followed through on my threat a few weeks ago, switching my mail from the cloud to a more traditional POP provider based outside the US.
As the voters who were so in love with Obama just a year ago switch back to fresher faces, I become alarmed at the shallowness of our personalities.
Then a few years ago I switched my default to dry brining.
A few months ago, I switched my home storage from Dropbox to Google Drive.
