For CS, it definitely ain't too late.
I know cats who got their CS degrees when they were older than 40 and it completely leveled up their pay and career astronomically.
While many people get jobs w/o a degree in this field, there are some jobs that won't pass the HR filter without a degree.
Additionally, the school don't matter unless it's a top 5: they simply care if you got a degree or not.
That basically means: certain doors open to those with CS degrees. That's worth getting your degree at 55 years-old for.