There's no question that VR can be a godsend. I have learned to shoot a non-VR 400mm lens on APS-C (Canon 400mm f/5.6L, arguably still the best budget birding lens if you use good technique) . The learning curve for shooting birds in flight was painfully steep, even using shutter speeds of 1/1000 sec. My keeper rate has gone way up since I learned best handheld panning techniques and routinely shoot in high-speed burst mode. If it isn't moving and I can pre-focus, eg, bird on nest, I will use the tripod and wired release whenever possible, even for 1/1000 sec and faster.