Sigma has gotten a lot of attention lately and folks are raving about all their new lenses, so I kind of figured I´ll just take a look at what L-mount set up would look like for me. Honestly, at first I thought I might be tempted, but in the end I am not intrigued at all. There would be absolutely no equivalent for my RF 100-500mm (Sigma 150-600mm comes close, but AF is not as good plus it weighs 2.1 KG) and my RF 14-35mm F4 (my two favorite lenses) and even 70-200mm F4 doesn't seem to have an equal competitor.
Sigmas prime lenses line-up is impressive and I do love the price points Sigma is hitting (Sigma 35mm F1.4 at 879 €/ Canon 35mm F1.4 VCM currently 1.549 €). If one really needs more then one or two primes and is on a budget, I would strongly feel the urge to use e-mount or L-mount. But even when comparing the cheaper primes (RF 35mm F1.8/ 85mm F2) it is hard to find primes which have the same close focusing abilities. So, sry, L-mount does not seem the option for me but I understand why others would choose it. I´d be missing lots of great canon gear! I do hope and wish Sigma will one day release FF for Canon RF. Atm, I am looking to add the 50mm F1.4 L VCM prime, but I'll wait for a decent price. The difference of 700 € to Sigmas offering is ridiculous imho.
Comparing to e-mount, again no equivalent for my favorite two lenses. The 50-150mm F2 and the much lighter 28-70mm F2 are damn intriguing, yes. But with both lenses I´m pretty sure that with all the rumors floating around, Canon will release a 70ish...150mm F2 lens (hopefully even lighter) and a mkii (lighter than 1kg) for the 28-70mm F2. It just a matter of time. The only lens that I´m really jealous of is the Sigma 20mm F1.4. Canons option is just waaaaaaay too pricey. Not gonna happen...like ever...
Plus, I recently was able to shoot with the Sony A7vi again... the ergonomics of that camera are horrible! It feels like a brick. I´d gladly give up a couple of lens options for great ergonomics.
So, what I am actually saying: sailing ship and leaving would leave a lot to regret (at least for me) and of course, the gras is always greener on the other side. A prime heavy set-up will benefit from e-mount/ l-mount, but other than that I don´t really see the point of switching. L-mount lacks some great options, Sony prices are pretty much up there with Canon. There are options Sony has and Canon hasn't, but the way around as well.
For me, I have to be patient with my purchasing. Canon retail prices are sky high, but being patient usually saves several hundred dollars or Euros.