If you want to take photography seriously, choosing a camera/lens highly dependent on the type of photography you want to do.
you have to make a choice on what you want to shoot, or in other works "choose what you don't want to shoot".
for example wild life requires high speed and high focal length cameras where as portraiture requires other stuff. Street photography requires something different.
journalism requires some other type of gear.
Changing lenses is pretty straight forward if you know how to clean your stuff. cleaning camera sensor and lenses in mirrorless is pretty straight forward if you have the right gear like dry brush and proper solvents. for example I use a dry brush(compressed inert air can) instead of rocket blower, contact lens cleaning fluid, ear buds and cheap toilet paper (toilet paper was the best lint free stuff I found after few experiments)
Also powerful led torch
if you cant do this, its better you dont change lenses often.
Thanks for your thoughts.
So, in other words, changing lenses is easy-peasy, but cleaning them/sensor is a chore,
.
What I was trying to gauge was how easy would it be to switch lenses back and forth. So for instance, say you are in/on (?) the London eye. Your better half poses for a portrait. You take that shot. Later, you spot a cool building in the distance. Is changing lenses then practical?
Put that way, even if changing lenses is easy, I think it'll detract from the experience of being there. Not to mention the fact that your better half/family will get tired of it pretty soon.
As you can see from the scenario I've put forth, it's not so much about being serious about any particular aspect of photography, in this case. Rather, it's more about getting a good all-round device with decent iq.
Even when I'm "serious" about photography (which isn't always though I did wake up at 4am once to be able to photograph the Gateway of India in morning light), I'm striving to be good at whatever I shoot - be it portraits, action, landscapes, macro etc. So I feel the need for a good all-round device remains much the same.
Though my original question isn't one about camera suggestions, I'll dwell on it a bit since that's where the discussion seems to be going-
The travel zooms have the zoom but not the pasm modes & raw ability, besides the smaller sensor. But they are comparatively cheap.
The high end compacts like the RX100 are a bit pricier but they have better iq, pasm modes & raw ability. The downer is the optical zoom.
At a similar budget are bridge cameras like the Panasonic FZ70 or FZ200. These are different from the high end compacts in terms of a. a smaller sensor b. a much greater zoom c. much bulkier.
The bulk of the bridge cameras gets them closer to compact dslrs. The dslrs tick all the boxes but for the zoom. The zoom can be achieved with carrying 2 lenses (which brings up the question of ease of changing), or an all-in-one (which pushes the cost further up). The problem of being bulky remains.
The seemingly ideal solution is an m43 system with an all-round 14-150mm lens (or a Nikon 1 with 10-100mm lens). That is expensive, of course.
This situation led me to wonder if digital zooms on the compacts like the RX100 can make up for the lack of greater optical reach. In this eg., the 2x digital zoom will enable a reach of 200mm (35mm equiv) instead of 100mm.
Again, thanks to all for the replies.
PS: Quick question - Will 2 identical focal lengths (35mm equivalents) from 2 cameras with different sensor sizes result in the same field/angle of view/magnification?
So in other words, will a 200mm (35mm equiv) lens/focal length on a 1/2.3" sensor give the same zoom/magnification/field of view as a 200mm (35mm equiv) lens/focal length on an APS-C sensor, if both cameras shoot from the same spot.