Assuming python sqlite is being dumb with regards to transactions and functions and that simple optimizations aren't just futile efforts from ignorance and narcissism has saved me 100s of hours in runtime alone.
Also the commonality of fast networks really hit me this year. I was using free wifi at a small coffee shop in Tokyo and was transferring files to my apartment in Los Angeles at ~20MB/s. That's faster than my local LAN was 15 years ago over 5,000 miles of ocean, so cheap that they give it out for free if you buy a coffee. Absurd
Also the commonality of fast networks really hit me this year. I was using free wifi at a small coffee shop in Tokyo and was transferring files to my apartment in Los Angeles at ~20MB/s. That's faster than my local LAN was 15 years ago over 5,000 miles of ocean, so cheap that they give it out for free if you buy a coffee. Absurd