Not to say something controversial, but I think krikzz's priority is to SELL his products,, he's not even posting on the forum anymore,, it's all on twitter.
The usual support here is "try a different sd card" is completely unacceptable for 100-200$ products.
Not acceptable? I wonder, what exactly you expecting for? When you buy some apple gadget, for 1000$ as example, can you take some direct feedback from the engineers who working over device development? In best case you will take few completely useless tips from guy in call center. You talking about 100-200$ product like about very limited exclusive car for 10 000 000$. This is not working that way.
I do what i can, but i not an god. i physically can not sit here and give the tips how to copy files on sd card and work over development at same time. So, time to time i here, but rest of time i working over hardware and my scoliosis. Back in 2010 i always been ready to response because i had only one cart and few customers, now i should support much more people and devices, but i still have only one head and two hands.
Speeches about rejecting old product for sell new ones is completely nonsense, i did NEVER get any sales boosts after releasing some updated versions of products, such releases always stays invisible in sales diagrams, only completely new product, which did not been in everdrive range before, gives sales boosts. Well, may be sd2snes pro is the only exception, but hype ends pretty fast anyway.
I making new products because my perfectionism want it, and they usually not supported with old because i do not want be limited by legacy designs which were made when i been less skilled than now.
From commercial point of view there is no any sense to replace old version of products, especially if they do not have competitors. It waste of time to make new version if current version sells good already, but i do this anyway. For good commercial results i shouldn't release any update version of devices which already exist, only completely new devices should be in priority. Also, even if i forced to update something due outdated parts, i rather would stay all on old software to save the time, if my focus would be commercial profit only, but perfectionism force me to made all from the scratch and drop compatibility with old devices.
Oh, and what about sd2snes, profit guy probably would drain old stock before release new sd2snes-pro, but instead i released it before and start sales once pro was ready, old version now on sale with large discount and i still have lot of unsold, who knows how many time need to sell them now.
So, please, not make me again listen stories about changing device hardware to make more money.
As for v20, well, i really don't know why it not working for some of us, it work on all my test carts and all my systems. I do not know how to fix the problem if i can't see the problem. But what if i would not made v20 at all? N8 still be best in terms of mappers support and features, all would be happy with v16 or some v17 with minor updates. But i tried to made huge jump for N8, spent incredible amount of time for all those mappers and fds sound and what i have after all? Only complaints? I must say this is dissapoint and demotivate me.
I want to say once again that when you buy the product, you guaranted will take the item with specification listed on the product page on the moment when you buy it, nothing else. Don't blame me that you did not get enough updates, i did not promised anything except what i already have.