I don't have the will at the moment to go into this deep, but just like I have changed my mind and considered evidences and scripture on other issues throughout the years, I have become more open to the possibility of an old earth based on biblical language and other small evidences not necessarily external to scripture, but internal.
With that said, the young earth model is still solid and its one of those positions that is an issue to many, but much of the issue in my mind has more to do with why someone holds a position, not that they hold it. For example, someone who accepts old earth and does so based on (man made) science alone is more concerning than someone who like myself, finds scriptural reasons and also accepts young earth scientist as legit.
I know many die hard young earthers will say I am compromising scripture, but most would also say "flat earth" believers are nuts and yet, they think you are compromising scripture. Extremes are always part of any position. Yes, there are flat earth believers out there for real.
I don't know where I will eventually land on the subject and I will stop short of saying I am being open minded because I hate the use of that term. It's condescending in most instances and that is not my position. I simply have looked at the evidence and realize there is merit. I don't take an old earth position and still lean young earth, but I at least understand and believe the old earth position isn't as far fetched as I used to believe.