The phrase "and has since accelerated" is correct and usable in written English.
It can be used to indicate that something has increased in speed or intensity after a certain point in time.
Example: "The project started slowly, but it has since accelerated, leading to impressive results."
Alternatives: "and has since increased" or "and has since progressed rapidly".
Google identified the trend towards mobile browsing several years ago and has since accelerated the shift with changes to its search favouring mobile.
"But you are presenting an unacceptable threat to us, and we have to respond". Kim, one of the youngest world leaders, took over with the death of his father, Kim Jong Il, in 2011, and has since accelerated the pace of missile and nuclear tests.
The state issued environmental permits last June, and the Pataki administration, eager to get new plants built, has since accelerated the process.
Even during the global financial crisis, Australia, unlike many Western economies, registered modest growth, a trend that has since accelerated, as commodity prices have regained their footing.
If "Stuck in an Oven with Jews" was shocking before social media, the race to the bottom has since accelerated into free fall.
While beat cop reticence could be a factor, Daniel Webster, director of the Johns Hopkins Center for Gun Policy and Research, points out that homicides and shootings in West Baltimore were on the rise before the Freddie Gray unrest, though the pace has since accelerated.
Interest has since accelerated rapidly – in the last two decades more than 30 review and perspective articles have emerged on the topic (Merilä 2012), and 12 new reviews are published in this issue.
Buybacks have since accelerated, with total US stock repurchase announcements crossing $1 trillion in a single year in 2019 for the first time.
"This is part of a process that began in the late '90s at The Voice and has greatly accelerated since the New Times people bought it," he said.
The authors of "The Student Aid Game" say that merit aid grew at a 13percentt annual rate (after adjusting for inflation) in the 1980's and has apparently accelerated since.
As far back as a decade ago, the party began shedding the old strategy of its dead leader, Deng Xiaoping, that mandated that China should "bide its time". An aggressive China emerged under party leader Hu Jintao and has only accelerated since Xi took power in 2012.
