Earlier quoted context omitted.
Also apps do get updated, and when they do they sometimes grow by almost a 100 MB. Repeat that X times, and the RAM on the phone turns out to be insufficient for larger apps of the new now.
Facebook app was 600MB on my girlfriend's phone. Unbelievable. What the hell does Facebook need 600MB for? (granted it was the mostly the data but it made her phone run like crap because the data is stored in internal storage, not on SD card). I cleared the data and it was back to 150MB in less that an hour. So off course people feel like their phones run like crap with apps like that. I mean even a $50 phone today i…
Cache. Phones have limited storage, but they're also limited by bandwidth, latency and power. If the Facebook app did no caching it'd run slower, consume more battery and eat up the data allowance of people on limited plans.