Season 1 lb beef chunks and 1 lb bone-in chicken thighs with adobo seasoning. If using pork shoulder, season ½ lb of it as well.
Heat oil in a large stockpot over medium-high heat. Brown the beef and chicken in batches until golden. If using pork, brown it as well. Remove the meat and set aside.
Add 3 tbsp sofrito to the pot and sauté for 2-3 minutes. Stir in 1 packet of sazón and return the browned meat to the pot.
Pour in 8 cups of chicken or beef stock, scraping up browned bits from the pot. Bring to a simmer.
Add yautía, yuca, and plantains. Simmer for 15 minutes, then add the potatoes, calabaza, and corn.
Cover and simmer for 30-40 minutes, stirring occasionally, until the vegetables are tender and the chicken is cooked through (165°F internal temperature).
(Optional) Remove the chicken, shred the meat, and return it to the pot.
Taste and adjust seasoning with adobo or salt. Ladle into bowls, garnish with fresh cilantro, lime wedges, and avocado slices, and serve warm.