Fitness I think.

The top tier of fitness across a number of activities has never been more competitive.

I get the impression that in previous centuries (and maybe even previous decades) individuals who were particularly coordinated and fit could succeed in many different professional sports.

Now, each and every physical activity… no matter how niche seems to have an incredibly competitive upper echelon, wether it is soccer, cricket, marathon racing, ping pong, archery, rock climbing, surfing, or whatever. You need to dedicate extraordinary amounts of time and energy to that activity to be the best.

I suspect this hasn’t always been the case. I wouldn’t be surprised if there are more professional athletes now relative to the population size than ever before.

Cheap electronic gadgets that are made in China.

If China wants to be paid the couple of trillion dollars that they are owed by other countries then the cost of electronic devices will go up.

Cheap semiconductors, such as chips for TVs, smartphones, computers and cars.

China considers Taiwan to be a rogue province that should be part of China.

If China invades Taiwan there is likely to be major disruption to semiconductor manufacturing.

Cheap telephone calls

(if you don't mind if you don't mind computers at Three Letter Agencies analyzing your communications)

Javascript, cryptocurrencies, English.

Enshittification.