Productivity tools are for procrastinators
The serious operator has fewer tools, used more deeply, for longer.
The pattern of constantly switching between productivity systems is procrastination dressed as productivity. Each new system feels like progress. Each switch is an excuse to not do the work for a week while you set up the new tool.
People who actually produce work tend to have boring tool stacks. They use the same notes app they used five years ago. The same calendar. The same to-do list, often hand-written. They've optimized at the level of habit, not the level of software.
The reason is that the friction of changing systems is higher than the marginal benefit of any new system. By the time you've migrated everything, learned the new conventions, and rebuilt your workflows, you're back where you started, two weeks later, with one less product shipped.
Three rules I follow:
Pick a tool for each function. Use it for at least two years before considering changing.
The "shiny new tool" instinct is almost always procrastination. Recognize it as such.
Most productivity systems are equivalent at the level that matters. The differentiator is whether you actually use the system, not which system you picked.
If you've changed productivity tools more than three times in the last year, the problem is not the tool.
The problem is the work.
Pick a tool. Use it. Do the work.
The tool is not the bottleneck.