I have subwoofers in 3 of my 5 hi-fi systems, because one of the things that strikes me when I attend the symphony is the power of the low frequencies. Subwoofers help to deliver the dynamic impact of hi-res recordings (e.g., SACD, Blu-ray, 24bit/192kHz FLAC) of large-scale orchestral music. My frame of reference: full season tickets to the symphony and opera (plus other smaller scale classical performances). IME, the double bass, bass drum, and pipe organ deliver powerful bass content in large-scale orchestral compositions.
These 3 systems of mine don’t have “wimpy” main speakers - and music with these systems can be enjoyable without a sub. But with a sub is better.
Basement system: Front, center, and left speakers are Klipsch RF-7 II. (Each RF-7II: Dynamic 1.75" titanium Tractrix™ horn-loaded compression driver. Dual 10" high-output Cerametallic woofers.) A single rear speaker is a Klipsch RF-7. Subwoofers: SVS SB16-Ultra, Klipsch R-115SW.
Living room: Stereo speakers are Snell Type CV. (Each Type CV: two 8" woofers, two 5" midranges, one 1" titanium-dome tweeter, one switchable rear-firing 1" tweeter.) Subwoofer: Klipsch P-312W.
TV room: Stereo speakers are Klipsch Palladium P-37F. (Each P-37F: 0.75-inch horn-loaded tweeter, 4.5-inch midrange and triple 7-inch woofers.) Subwoofer: Klipsch P-312W.
(Two other systems have tower speakers without subwoofers.)
My Oppo universal players (UDP-205 x 2, BDP-105, BDP-95) feature "bass management" - i.e., a built-in configurable crossover, and a connection for a powered subwoofer. With Oppo's bass management, the low frequencies are off-loaded from the main amp and speakers, thereby facilitating greater overall dynamics.
IME, subwoofers can be a PITA, because audio recordings and movies are not consistent in bass content. (I dislike intense LFE in movies. I have no interest in recreating the rumbling of an earthquake in my listening room. I don’t want to be assaulted by my hi-fi system.) Because of the wide variance in bass content in music and movies, my opinion is that a remote control is a useful feature for a subwoofer.