The phrase "and primarily so" is correct and usable in written English.
It can be used to emphasize that something is mainly or chiefly the case in a particular context.
Example: "The project was successful, and primarily so due to the team's dedication and hard work."
Alternatives: "and mainly for that reason" or "and chiefly for that purpose."
Writing in Yedioth Ahronoth, commentator Eitan Haber said: "A 61-seat government is hell for members of the coalition and primarily so for the person who shoulders the responsibilities of coalition chairman … The coalition chairman is going to have to be a magician and a contortionist to maintain a permanent majority in the plenum.
A substitution of an EV for a traditional car, considering transport to the holiday house, is primarily a problem for a majority of those living in the metropolitan area of Oslo, who have the longest distances to their summerhouse, and primarily so during winter time.
We've been focused on the iPhone and iPad primarily so far.
So I suspect the Big Ten, the other major conferences, and the NCAA are all desperately seeking ways to reestablish the notion they admit the athletes in football and basketball primarily so they can get an education.
Moderate decision-making centers too, and perhaps primarily so, are involved, meaning the decision-making Muslim capitals led by Tehran and Riyadh, and also the capitals of major powers led by Washington.
His main wish for amalgamation, and later federation, was primarily so the complementary economic strengths of the Rhodesias could be put to best use.
Friends, I come not to mock the event formerly known as the world championship but to celebrate a truly national sporting event that, alas, has no real equivalent in Britain now that It's a Knockout is just a fond memory and the FA Cup exists primarily so that boring old men can drone on about how great the FA Cup used to be.
She asked me to buy her an iPad Mini to take with her primarily so we could chat and stay in touch.
Even America's Joint Non-Lethal Weapons Programmedefines NLWs as "weapons that are explicitly designed and primarily employed so as to incapacitate personnel...while minimising fatalities, permanent injury to personnel, and undesired damage to property".
Status makes people feel important, and while everyone enjoys it, the rich build fortunes primarily so they can live life on their own terms.
This was primarily so they could judge whether the amount and type of feedback that they were giving was appropriate.
