Personally if I am going to spend more than $100 I am going to comparison shop and I like having multiple windows open to do it in.

Opening a specific airline's app and just getting whatever they have on offer is completely foreign to me. I would think I am getting cheated.

Also, federal taxes may be easy but the only way to free-file the state tax is to do it directly with the state and that means filling out a form myself.

I just mentioned in another comment, we travel a lot

https://news.ycombinator.com/item?id=44583545

We don’t comparison shop. Domestically flights on Delta, hotels are either Hyatt or Hilton brand hotels. Internationally? Most Delta partners (AirFrance, Virgin Airways) or Delta itself.

For Hilton, we get points directly and can transfer from Amex (rarely worth it). For Hyatt, points are more valuable and it’s easy to get points from Chase credit cards (r/churning) that can be transferred to Hyatt (saves us thousands a dollars a year sometimes).

On Delta, we have lounge access, 2 free checked bags, free regional (domestic, north and Central America) flight upgrades, priority check in, etc.