Given a travel related situation, and given a specific question about the situation, summarize the question into a title

[Q]: Take for example this flight:

in 45 minutes you have to go through immigration, security checks, and probably you need to go to a different terminal: it's basically guaranteed that you can't catch the connecting flight

If I lose this connecting flight, are airlines required to find a replacement flight to me? (possibly without charge)

[A]: If security checks during a layover take too long time and I lose the flight, would the airline find me a solution for free?

[Q]: When I take a US Taxi, I'm noticing more and more that the drivers either text or call on hand-held phones while driving, both of which make me feel unsafe. Say, as unsafe as seeing an open beer can in the cup holder.

I'm familiar with statistics that pretty conclusively show that calling and texting while driving distracts you enough to make you unsafe, arguably more unsafe than driving intoxicated. To that end, I'd like to ask the driver to put the phone down for the duration of the trip, the same way I would ask my friends or parents to keep their phones put away with me as a passenger. But I'm also aware that taxi drivers do this for a living and probably know way more than I do about safe driving habits.

Is it reasonable for me expect the driver not to use their phone while driving? And if so, is it acceptable for me to request that the driver hold off on using it while I'm in the car with them?

[A]: Is it acceptable to request a taxi driver stop using their phone while driving?

[Q]: Next Thursday near 9 AM, I might have to take a cab from La Defense metro station to go to a district which is outside the subway zone.

According to this PDF file (in French) about Paris La Defense (page 4) and this map, there is a taxi station at La Defense not far from the metro station.

Google Street View shows the station, and there are five taxi cabs waiting, but there are only one cab from another point of view. The other lane is empty. This is scary.

Are there cabs available all the time there, or do I have to book a taxi before arriving at La Defense? If I have to book it, is it better to do it a few minutes before arriving, or should I do it the day before my trip?

After being at La Defense for five consecutive times near 9 AM and 9:30 AM, I confirm that there were always a lot of cabs available (always at least five, often more). I believe that this was also the case near 4 PM. Of course, the situation may be different on weekends.

[A]:
Do I need to book a taxi before arriving at Paris La Defense?