I have only been doing this for a few years, so I am not a pro like others who belong to the forum. However, I can tell you that I have had problems with certain cutting varieties that just seemed to never wake up with any non-soil option I tried, perlite, vermiculite, moss, baggie method, etc.
A few years ago, I had a few cuttings ( that I started in March), that were not rooting, and it was now June! By then, I figured they were definitely going to be goners, however, they were still green after all that time.
Previous, they were in baggie method, then in cups with straight perlite.
So, I then did a mix of half perlite with half potting mix, and within a week, they woke up! I was amazed.
A few years ago, when I first started with fig cuttings and was having this issue with certain varieties, Jon told me that sometimes certain cuttings will stay dormant and not wake up until they come in contact with actual soil. They need something in the soil to actually wake them up. (Jon, if I quoted you wrong, please let me know).
So, I would try a mix of perlite and potting mix. Some of my cuttings this year, I am actually using this mix instead of moss with the shoe box/take out container method and it is working great! Or, you can do the cup method.
This is just my experience.