yes i already had my worries about tegra, but i didn't know they don't share their sources? devices builders are bound by law to release the kernel source along with its drivers
moreover you have to remember HTC devices have a much wider support in XDA then any other brand, for example check the xperia ARC forums despite having snapdragon 2 the support is limited
finally a history reminder XDA developers was founded to support the O2 XDA devices made by HTC which had an Nvidia Goforce GPU
if anything it might be warm come back to nvidia
Of course there are negative sides to Tegra, but there are and always will be negatives for any product you come across. I don't look at the wrongs, I see potential improvements. A friend of mine works for Nvidia and we are in constant touch regarding improvements of Tegra based devices and other. That being said, I think I was the first dude with a Motorola Xoom in Europe lol...
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