for me i felt is not necessary as without it i still can use
Depends on your focal length and intended effect.
You will want to have image stabilisation when at longer focal length as it not only helps in capturing a stable shot but also aid in composing the photo by reducing the shakiness, thus giving you a more accurate handheld framing.
Image stabilisation is also good when you do not have a tripod but you want to drag the shutter speed for a mood shot. I.e a still subject but with motion blurred background.
Beyond 200mm, it's needed for composing.
Below 200mm, it's needed for videoing.
It is a good to have... not really necessary.
Canon 5D MkIII|70-200 f/2.8L IS II USM|24-70 f2.8 L II USM|Σ 50 f1.4 EX DG HSM
There's a whole army of photographers (on this forum and elsewhere) who were producing good work before image/lens stabilisation was ever introduced. So 'no', not strictly 'necessary'.
In the same vein, all you really need is a sensor, lens, and shutter (+ some control device/circuitry) in a light-tight box. You don't NEED a LCD display, auto-aperture, autofocus, auto exposure, in-finder displays, etc.
Like all these other features technology has added to our tools, it can be very useful. And it can open up new possibilities and opportunities that just didn't exist before.
Use what helps you to get the results that you want / need to deliver. If you have always bright sunshine and can use ISO 800 then there is little need for additional stabilization. Maybe you should try your lenses on the long end after sunset, somewhere in the city, using ISO 800 as maximum value? Of course, no tripod
even when shooting wide like 24mm, IS is useful when you want to shoot at 1/2 1/4, 1/8 secs for example.
Most people do not shoot at these speed but i find it an impactful technique to convey motion and time.
For me it is switched off unless the shutter speed goes too low
If u use tripod so often, image stabilisation is totally of no use to you .
yes i use..
i on it all the time..
i got no tripod or any form of pods.
Even when its on the table..its on too.