What a great question as it addresses both reliability and obsolescence. Imo DAC design and the chips have made significant advances over the last decade. The main concerns will likely result from connections (usb, wireless, ethernet etc) and possible sampling changes i.e. MQA. Buy the best you can afford and if those factors change significantly sell for ~50% of what you paid. You will have had 3-5 years of enjoyment at least. While above my intended budget, I just dumped $6k on a streamer/dac and couldn’t be happier. 100,000 + tracks to explore and enjoy at my fingertips and sound quality close to +/- with my vinyl depending on source quality. If I sell in 4 years at 50% my out of pocket for those thousands of hours of enjoyment is ~ $60/month. Not nothin but life is short and we are all here for the love of music.
