For $4, think of the time that you spent thinking about it. Lower your frustration and replace it now. Keep the CFL on shelf for just in case.
I already have a drawer full of LED bulbs for future needs, its not about frustration, i just wanted to see how long the CFL would last, they have already butchered their rated lifetime by maybe 3-4x.
When CFL's came down in price a few years after were introduced I bought a few of them. Not long after, our local power company started shipping free CFL's to their customers who signed up as being interested. 25w, 40w, 75w and 100w equivalents. Boxes of two of four would just appear in the mailbox every few months for a couple of years. Even a few boxes of 3-ways!
There are now a couple of drawers full of CFL's of all sizes, probably 25 or 30 bulbs total.
The vast majority are instant-on, with a few of the early ones that exhibit the half-second or so delay to energize. I've learned to live with that, along with the ramp up in brilliance once on. They just keep plugging along. Out of 24 or so CFL's in service, I've only replaced three that failed (not counting the 'fridge bulb). Two just failed to energize after many service hours, one in a table lamp smoked it's ballast years ago after just a few hours. I put that down to infant mortality in the electronics.
I tried one in a refrigerator that didn't last long, whether from the cold or repeated short-cycling, or both.
So, until I work through all these free CFL's, I don't see any LED's in my future except for a few shop lights.