Honestly, I'm not sure much has changed in a year except for the introduction of a couple new products. Your best choices (unless you have a Lutron RA2 system) are either or both ZigBee or Z-Wave motion sensors. Each has categorial advantages and disadvantages: Z-Wave uses a lower frequency and tends to have better range. ZigBee tends to report motion faster (usually <1s of difference but sometimes more; annoying with motion-based lighting). With repeaters, range is not necessarily a problem for either.
Indoors, really anything should do. I iike the Iris v2 motion sensors, but with them being replaced by the short-lived v3 sensors and the entire product line being pulled from shelves due to the Iris shutdown, you'll only be able to find them via third-parties for the time being. The "new"/2018/v5 ST motion sensor is also good though much larger than these two. All are ZigBee. For Z-Wave, the Dome Motion sensor (DMMS-1) is reasonably priced and has worked well for me. The Aeon Multi 6 is a bit slower for me but not bad and does more if you need any of those features; the Tri Sensor is supposed to be similar (without as many extras as the Multi) and cheaper but has mixed reviews.
Most of what you read a year ago should be still good except there were never any good outdoor sensors--just many of us using indoor sensors outdoors. 
If they're reasonably protected from the elements, many will work well. I have Monoprice 15271 outside under a soffit, and it has been working a well as it ever has (which was way too slow to use inside, in my opinion)--even in the recordbreakign -30 °F lows we had here recently (where I also discovered the sensor's temperature readings bottom out at -5 °F). I also have a Dome motion sensor outside and reasonably protected without problems. I had previously also used a Xiaomi with success (very cheap, so that's why I started with that--though there are other issues with these you may be aware of).
Recently, however, some dedicated outdoor sensors have been announced or released. If you're using yours near a floodlight, the HomeSeer HFLS100+ is new (Z-Wave). Hue also announced a new outdoor motion sensor (ZigBee), which will probably also be able to be paired directly to Hubitat, though not everyone is a fan of their indoor sensor on Hubitat, so I'm not sure how this one will compare. Zooz also just released the ZSE29 outdoor motion sensor (Z-Wave). It looks gigantic, but I'm sure that's just extra protection from the elements. Depending on what your motion sensor is for, some people have also effectively made existing "dumb" outdoor motion sensors smart by putting the light they automatically control on a smart switch that reports power; when the power usage goes up, motion was detected.
Beyond that, it just comes down to preferred protocol, price, appearance, and whatever other factors you consider important.
