I have a 2010 Ford which I have been very happy with since I bought it used with 20,000 miles on it in 2012. It now has 94,000 miles on it and in the past month has had more repairs than the past 6 years combine - fuel injectors (~ $1000, and door handle ~ $250), now the "check engine" light is on again and I really don't want to continue to put money into this vehicle. I am not handy at all with repairing vehicles. I am thinking it might be time to sell or trade in this car and get a (probably) used Honda or Toyota (probably an Accord or Camry). I was really hoping to keep this car for a much longer time, I only put around around 6000-7000 miles/yr on this car. At what point is it time to cut losses and move on to a (hopefully) more reliable car?
100,000 miles for a modern car is NOT the same as 100,000 miles for a car from before the 00's. With decent care, even "just" a Ford should go for 250k before reaching end of life.
That said, you have to actually do the maintenance or it will die well before that. The 100,000 mile mark is where a lot of major maintenance comes due on a modern car (whereas with older cars you had major maintenance every 20 or 30k). Keep that in mind, you've probably had little or no ongoing maintenance cost for this vehicle up till now, but there will be a lot of it now. Fluids (coolant, gear boxes/transaxle, power steering, brakes, etc.) as well as plugs/coils, suspension, timing, etc.
That's all normal maintenance, not "repairs". If you do it all, the car will go another 100k with little maintenance. But if you don't do it, you'll do major damage.
I'm a car guy, and even a 8 year old/95k daily driver is just not worth replacing (15-20y/150-200k is always my target), but if you want to and it doesn't impact your financial goals then do it.