Of course I've considered it, but it won't happen with this truck. A little background. I cut my teeth rockcrawling in my FJ40 and it was pretty built and I ran some gnarly trails in it. I had an '85 pickup with a solid front axle at the same time that got some trail use. A little later I had a very built '93 pickup with a solid axle swap and dual t-cases etc. That entire time I've also had my FZJ80 Land Cruiser. So I definitely know all the benefits (and drawbacks) of having a solid axle up front. For this truck and how I use it a solid axle would be the wrong choice. I don't need a better rock crawler. I still have the FZJ80 and it can handle all that stuff until I build another FJ40. This Tacoma is the truck I want to use for exploration and higher speed dirt tracks. It still rockcrawls surprisingly well IMO with the IFS. In fact it does well enough that I really see no need for a solid axle. It already handles some of the difficult trails in Moab. If I wanted to run the most extreme trails in Moab or elsewhere I wouldn't do it with this truck anyway even if it did have a SAS. It too long, not great departure angle for the extreme stuff unless I got it a lot taller and did some extensive body modification. Frankly, your 1st gen truck would be a better candidate to build up for that type of use. This Tacoma is miles better at the exploration and desert road type travel than any other truck I've had.
.
So that's a long-winded response. Short answer is this truck would not benefit from SAS. If anything changes with the front end it will be a move to a long travel IFS setup so I can go faster in the desert.