This might work occasionally but if your goal is to reach Iron Exec levels of strength you best use a range of ways to identify that you are progressing. The following are some effective ways you could incorporate alternative ways of knowing you are progressing:
Time/Density: If it is taking you 40 minutes to complete your squat routine working up to your final max set is it possible next time you can complete it in 38 min? Are you able to still lift the same loading progressions but complete them in a shorter time? If you can then you are progressing. The density of the workout has gone up as you can now pack in more work in a shorter period of time. A good indication your strength is progressing
Quality: Your max bench may be 140kg but the lift is hideous. Your butt is coming off the bench, it takes about 6 seconds to complete and your training partners hands were on the bar as he shouted "it's all you bro". What if you kept lifting and training properly and you can complete the 140kg bench with your butt down, a genuine pause on the chest and a confident clean lockout? You have progressed. Whilst the load is the same the quality is vastly different. Do not underestimate the "quality" of the lift as an extremely accurate indicator of your strength progressing.
Recovery: Does your typical leg workout leave your lower back and legs completely trashed? Can you barely walk for 2 days after it? That might be fine. The thing is if you can keep at it and begin to complete the same level of work but feel net to know soreness the next day this can be an indication of strength progression also. The reason this indicator is important is that it has taught you that you can handle the volume you are currently doing. You then need to ask yourself; do I add more volume or load? My recommendation is not to add both. Control one variable and monitor your progress. Getting brutally strong and jacked is not an overnight thing. It takes years.
We all want to add weight to the bar. The smart lifter however knows that this is not a linear progression where you can do this every time you step in the gym. Be wise. Adopt some of the above indicators into your training and think carefully about how these indicators can provide a clarity of direction for your next training block.