During the recently completed DAC I was repeatedly asked about the expected backwards compatibility (or lack thereof) between the currently released UVM 1.0EA and the to-be-released UVM 1.0. Why this concern was so prevalent was not clear to me, but what did become clear is that some potential UVM users were hesitant to adopt UVM 1.0EA because they were worried that anything they did with this release might need to be extensively rewritten once UVM 1.0 was released.
When asked about this potential issue, I answered that the VIP Technical Subcommittee developing UVM was committed to keeping backwards compatibility as a first principle. Luckily, the Co-Chair of the VIP TSC, Tom Alsop of Intel, has now directly addressed this issue here. The bottom line is that potential UVM users need not let worries about backwards non-compatability keep them from digging into UVM 1.0EA today.