Depending on the range you need, something else to consider is an ILC: OM-3 with the M.Zuiko 12-100mm F4 lens. This gives you the reach to FF equivalent 200mm. Optionally, one can add the M.Zuiko Digital ED 100-400mm F5.0-6.3 IS II lens that extends the reach to FF equivalent 800mm.
To compare the three options, here are some of the relevant characteristics. All three cameras have 20MP sensors, however, the sensor in OM-3 is larger (micro-four-thirds), compared to the 1" sensors in the other two cameras. OM-3 with the two lenses is a more expensive system, however, it might be expected to produce better images.
Equivalent focal range
OM-3 & 12-100mm F4 (FF equivalent 24–200mm F8)
Sony RX10 IV 8.8-220 mm F2.4-4 (FF equivalent 24–600mm, F6.5 - 11)
Lumix FZ1000 II 9.1-146mm F2.8-4 (FF equivalent 25–400mm F7.6 - 11)
Total weight
OM-3 & 12-100mm F4 ~1.06 kg
Sony RX10 IV ~1.10 kg
Lumix FZ1000 II ~0.81 kg
RX10 IV is the best one with its stacked 1" sensor. If you need reach, it is good. RX 10 III is an option also.
RX10 IV
RX10 III
Canon PowerShot G3 X has similar zoom with 1" sensor, but slower af:
Panasonic LUMIX DMC-ZS200 / ZS100 is smaller with a shorter zoom+evf+1" sensor:
OM-3 with long lenses is not as comfortable as OM-1. I am using OM-1 II + Pana 14-140mm as my bridge camera with dog walks. 12-100mm is as big as Tamron 25-200mm or Sigma 20-200mm eg not smaller than A7CR+28-200mm combo... I like OM-1 II as it brings the other options as none of the other cameras for slower shots eg nd filters/stacked shots. so I prefer it for landscape shots...
cropped 14-140mm
Other 14-140mm, hand-held except last shot on a fence post
There is a reason the RX10 IV has skyrocketed on the used pricing, there really isn't anything that has the total package like it. The closest bridge is actually the FZ2500 in my opinion. It's advantage of an internal zoom and built-in nd filters make a lot of sense for todays video centric crowd. Also, for travel the FZ2500 can transmit RAW via wi-fi, the RX10 IV cannot. But it's worse for tracking, autofocus, and a less-sharp, shorter lens.
